PATENT ABSTRACT
A storage apparatus is provided, including a USB connector configured to communicate with an external device, a storage device including a cap for covering the USB connector, and an interface to control a communication with the external device via the USB connector. A memory stores data transferred from the external device via the USB connector and the interface. A controller manages the interface and the memory. A portable case is configured to contain the interface, the memory, and the controller. A user input button on an external surface of the portable case receives a user input so that the controller may control the memory to store different information based on how many times, or how long, the user actuates the button.

PATENT DESCRIPTION
CROSS-REFERENCED TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. application Ser. No. 09/695,636 filed on Oct. 24, 2000, and in turn claims priority to JP11-304389 filed on Oct. 26, 1999, and JP11-306817 filed on Oct. 28, 1999, the entire contents of each of which are hereby incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a searching system, a searching unit, a searching method, a displaying method for search results, a terminal unit, an inputting unit, and a record medium that allow information that was broadcast to be searched and properly obtained. 
     2. Description of the Related Art 
     A database system that allows data to be searched from a database stored in a computer system is known. The user obtains desired information directly from the database system or using a terminal unit connected thereto through a network. The user inputs a keyword that he thinks it is proper from the terminal unit. The database system searches the database corresponding to the input keyword and provides the user with the search results through the terminal unit. When the database system has provided the user with much information, the user can filter the information using another keyword. 
     Now, the case that the user searches music data from a database system will be considered. The user can know for example title information of a CD (Compact Disc) that contains his or her desired musical piece from the search results so as to purchase the CD. In this case, the music data is information about a musical piece as a unit of music. The music data is composed of for example a musical piece name, a performer name, an album name (namely, a music CD title), a released date, and a seller. The music data may contain audio data of a musical piece. In the database system, additional information that is for example a performer name, a title, an album name, and so forth is assigned as keywords of music data to each musical piece. 
     For example, when the user likes a musical piece that was broadcast from a radio broadcasting station, he or she searches the musical piece from such a music database. In this case, the user searches his or her favorite musical piece using keywords corresponding to additional information that was announced along with the musical piece. 
     In such a conventional music database system, unless the user inputs a proper keyword to the database system, he or she cannot obtain desired results. Thus, conventionally, when the user forgot additional information that was announced along with the musical piece, he or she cannot obtain desired information. 
     There is a situation that the user always carries a terminal unit that can search a musical piece from a music database and he or she searches a desired musical piece that was broadcast from a radio broadcasting station with the terminal unit. In this case, if the user likes a music that he listened to only a last part thereof, he or she cannot obtain the additional information of the musical piece. Thus, even if the user has such a terminal unit, he or she cannot know a keyword that he or she should input. 
     Thus, even if a contents provider who sells musical pieces and CDs provides listeners with a radio program, it does not directly contribute to sales of the musical pieces and CDs. 
     In the case of a digital broadcast, additional information may be superimposed to music data that is broadcast. Thus, the user can obtain additional information about a musical piece from digital data. However, in this case, the broadcasting station should create additional data for each musical piece to be broadcast and superimpose the additional data to the musical piece. Thus, the cost on the broadcasting station side increases. In addition, the user side should prepare a receiving unit that can extract additional information from digital data. 
     OBJECTS AND SUMMARY OF THE INVENTION 
     Therefore, an object of the present invention is to provide a searching system, a searching unit, a searching method, a displaying method for search results, a terminal unit, an inputting unit, and a record medium that allow the user to search contents that were broadcast without need to know an accurate keyword. 
     A first aspect of the present invention is a searching system for searching contents that were broadcast, the searching system having an inputting unit, a searching unit, and a terminal unit, wherein the inputting unit comprises a first storing means for storing information representing at least time at which contents were broadcast corresponding to a predetermined operation, and a first communicating means for transmitting the information representing time stored in the storing means to an external unit, wherein the searching unit comprises a second storing means for correlatively storing information representing contents and broadcast time thereof, and a searching means for searching information representing the contents stored in the second storing means corresponding to the information representing time, and wherein the terminal unit comprises a second communicating means for receiving the information representing time transmitted from the inputting unit through the first communicating means, a third communicating means for transmitting the information representing time received by the second communicating means and receiving search results transmitted from the searching unit, and a first displaying means for displaying the information representing time received by the second communicating means and the search results by the searching unit. 
     A second aspect of the present invention is a terminal unit for causing contents that were broadcast to be searched, comprising a first communicating means for receiving time information representing predetermined time from an inputting unit and transmitting the information representing the predetermined time to an external unit, a second communicating means for transmitting the information representing the predetermined time received from the first communicating means to a searching unit and receiving search results from the searching unit, the searching unit searching information representing contents from a storing means corresponding to the information representing the predetermined time, the storing means correlatively storing the information representing the contents and broadcast time thereof, and a displaying means for displaying the information representing the predetermined time received by the first communicating means and the search results of the searching unit. 
     A third aspect of the present invention is a terminal unit for causing contents that were broadcast to be searched, comprising a first storing means for storing time information representing predetermined time corresponding to a predetermined operation, a communicating means for transmitting the information representing the predetermined time to a searching unit and receiving search results from the searching unit, the searching unit searching information representing contents from a second storing means corresponding to the information representing the predetermined time, the second storing means correlatively storing the information representing the contents and broadcast time thereof, and a displaying means for displaying the information representing the predetermined time stored in the first storing means and the search results of the searching unit. 
     A fourth aspect of the present invention is a searching unit for searching contents that were broadcast, comprising a database for correlatively storing information representing contents and broadcast time thereof, and a communication interface for receiving time information representing predetermined time and identification information of contents from an external unit, wherein the information representing the contents is searched corresponding to the received time information representing the predetermined time and the received identification information of the contents. 
     A fifth aspect of the present invention is a searching method for searching contents that were broadcast, comprising the steps of (a) storing information representing at least time at which contents were broadcast corresponding to a predetermined operation of an inputting unit to a first storing means, (b) transmitting the information representing time stored in the first storing means to an external unit, (c) causing a searching unit to search information representing contents stored in a second storing means corresponding to the information representing time, (d) receiving the information representing time transmitted from the inputting unit at the first communicating step (b), (e) transmitting the information representing time received at the second communicating step (d) and receiving search results transmitted from the searching unit, (f) displaying the information representing time received at the second communicating step (d), and (g) displaying the search results of the searching unit. 
     A sixth aspect of the present invention is a searching method for searching contents that were broadcast, comprising the steps of (a) receiving timing information representing predetermined time and identification information of contents from an external unit, (b) searching the information representing the contents from a database corresponding to the received time information representing time and the received identification information of the contents, the database correlatively storing the information representing the contents and broadcast time thereof, and (c) transmitting search results searched at the searching step (b) to the external unit. 
     A seventh aspect of the present invention is a displaying method for causing a terminal unit to display search results of contents that were broadcast, comprising the steps of (a) receiving time information representing predetermined time from an inputting unit, (b) transmitting the information representing the predetermined time to an external unit, (c) transmitting the information representing the predetermined time received at the first communicating step (a) to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing the predetermined time, the database correlatively storing the information representing the contents and broadcast time thereof, (d) receiving search results from the searching unit, and (e) displaying the information representing the predetermined time received at the first communicating step (a) and the search results received at the fourth communicating step (d). 
     An eighth aspect of the present invention is a displaying method for causing a terminal unit to display search results of contents that were broadcast, comprising the steps of (a) storing time information representing predetermined time corresponding to a predetermined operation, (b) transmitting the information representing the predetermined time stored at the storing step (a) to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing the predetermined time, the database correlatively storing the information representing the contents and broadcast time thereof, (c) receiving search results from the searching unit, and (d) displaying the information representing the predetermined time stored at the storing step (a) and the search results of the contents received at the second communication step (c). 
     A ninth aspect of the present invention is a record medium for recording a control program that causes search results of contents to be displayed on a terminal unit, the control program causing the terminal unit to perform the steps of (a) receiving time information representing predetermined time from an inputting unit, (b) transmitting the information representing the predetermined time to an external unit, (c) transmitting the information representing the predetermined time to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing the predetermined time, the database correlatively storing the information representing the contents and broadcast time thereof, (d) receiving search results from the searching unit, and (e) displaying at least the received search results. 
     A tenth aspect of the present invention is a record medium for recording a control program that causes search results of contents to be displayed on a terminal unit, the control program causing the terminal unit to perform the steps of (a) storing time information representing predetermined time corresponding to a predetermined operation, (b) transmitting the information representing the predetermined time stored at the storing step (a) to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing the predetermined time, the database correlatively storing the information representing the contents and broadcast time thereof, (c) receiving search results from the searching unit, and (d) displaying at least the search results on the terminal unit. 
     An eleventh aspect of the present invention is a record medium for recording a control program that causes an inputting unit to input information representing time to a researching unit, the control program causing the inputting unit to perform the steps of (a) storing time information representing predetermined time corresponding to user&#39;s operation, (b) transmitting the time information representing the predetermined time stored at the storing step (a) to an external unit, and (c) inputting the time information representing the predetermined time to a searching unit, the searching unit searching information representing contents from a database corresponding to the time information representing the predetermined time at which contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twelfth aspect of the present invention is a record medium for recording a control program that causes an inputting unit having a counter that operates with a predetermined clock signal and that inputs information representing time to a searching unit, the control program causing the inputting unit to perform the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) transmitting the count value stored at the storing step (a) to an external unit, and (c) inputting the information representing time to the searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A thirteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, a connecting portion for directly connecting the count value stored in the storing means to an external unit, and a communicating means for transmitting the count value stored in the storing means to the external unit through the connecting portion, wherein the information representing time is input to a searching unit through the external unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A fourteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, a displaying means for displaying the count value stored in the storing means, and a communicating means for transmitting the count value stored in the storing means to an external unit, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A fifteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, a communicating means for transmitting the count value stored in the storing means to an external unit, and a sound generating means for generating a sound corresponding to the count value stored in the storing means, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A sixteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a first storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, an identification information generating means for generating predetermined identification information corresponding to the user&#39;s operation, a second storing means for storing the identification information generated by the identification information generating means, and a communicating means for transmitting the count value and the identification information stored in the first storing means and the second storing means to an external unit, wherein information representing time and identification information identifying contents are input to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A seventeenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a first storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, a communicating means for communicating with an external unit and transmitting the count value stored in the first storing means to an external unit, and a second storing means for storing data transmitted from an external unit through the communicating means, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     An eighteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a storing means for storing time information representing predetermined time corresponding to user&#39;s operation, a displaying means for displaying the number of entries of the time information stored in the storing means, and a communicating means for transmitting the time information stored in the storing means to an external unit, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A nineteenth aspect of the present invention is an inputting unit for inputting information representing time, comprising a first storing means for storing time information representing predetermined time corresponding to user&#39;s operation, a communicating means for communicating with an external unit and transmitting the time information stored in the first storing means to the external unit, and a second storing means for storing data transmitted from the external unit through the communicating means, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twentieth aspect of the present invention is an inputting unit for inputting information representing time, comprising a counter that operates with a predetermined clock signal, a storing means for storing a count value of the counter at predetermined time corresponding to user&#39;s operation, a sound generating means for generating a predetermined sound when the count value is stored to the storing means corresponding to the user&#39;s operation, and a communicating means for transmitting the count value stored in the storing means to an external unit, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to the information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twenty-first aspect of the present invention is an inputting method for an inputting unit having a counter that operates with a predetermined clock signal, the method comprising the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) directly connecting the count value stored at the storing step (a) to an external unit, and (c) transmitting the count value stored at the storing step (a) to the external unit connected at the connecting step (b), wherein information representing time is input to a searching unit through the external unit, the searching unit searching information representing contents from a database corresponding to time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twenty-second aspect of the present invention is an inputting method for an inputting unit having a counter that operates with a predetermined clock signal, the method comprising the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) displaying the count value stored at the storing step (a), and (c) communicating the count value stored at the storing step (a) to an external unit, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twenty-third aspect of the present invention is an inputting method for an inputting unit having a counter that operates with a predetermined clock signal, the method comprising the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) transmitting the count value stored at the storing step (a) to an external unit, and (c) generating a sound corresponding to the count value stored at the storing step (a), wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twenty-fourth aspect of the present invention is an inputting method for an inputting unit having a counter that operates with a predetermined clock signal, the method comprising the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) generating predetermined identification information corresponding to the user&#39;s operation, (c) storing the identification information generated at the identification information is generating step (b), (d) transmitting the count value and the identification information stored at the first storing step (a) and the second storing step (c) to an external unit, wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     A twenty-fifth aspect of the present invention is an inputting method for an inputting unit having a counter that operates with a predetermined clock signal, the method comprising the steps of (a) storing a count value of the counter at predetermined time corresponding to user&#39;s operation, (b) communicating with an external unit and transmitting the count value stored at the first storing step (a) to the external unit, and (c) storing the data transmitted from the external unit at the communicating step (b), wherein information representing time is input to a searching unit, the searching unit searching information representing contents from a database corresponding to time information representing time at which the contents were broadcast, the database correlatively storing the information representing the contents and broadcast time thereof. 
     According to searching system and searching method of the present invention, in an inputting unit, information representing at least time at which contents were broadcast is stored in a storing means by a predetermined operation. The information is transmitted to the outside. A searching unit searches information representing contents from the storing means corresponding to information representing time. The storing means correlatively stores information representing contents and broadcast time thereof. A terminal unit receives information representing time from the inputting unit and transmits the information to the searching unit. Search results are supplied from the searching unit to the terminal unit. The terminal unit displays the information representing time received from the inputting unit and the search results received from the searching unit. Thus, information representing time at which contents were broadcast is input from the inputting unit. The information representing time is transmitted to the searching unit. The searching unit searches information representing the contents corresponding to the information representing time. The terminal unit displays the information representing the contents. 
     These and other objects, features and advantages of the present invention will become more apparent in light of the following detailed description of a best mode embodiment thereof, as illustrated in the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram showing the structure of an information searching system according to the present invention; 
         FIG. 2  is a schematic diagram showing an example of the structure of a musical piece data searching system according to a first embodiment of the present invention; 
         FIG. 3  is a schematic diagram showing an example of a play list; 
         FIG. 4  is a schematic diagram showing an example of the appearance of an auxiliary terminal unit (for example, a book marker) according to the first embodiment of the present invention; 
         FIG. 5  is a block diagram showing an example of the structure of the book marker according to the first embodiment of the present invention; 
         FIG. 6  is a schematic diagram showing an example of time information stored in a memory of the book marker; 
         FIG. 7  is a block diagram showing an example of the structure of a gateway device; 
         FIG. 8  is a schematic diagram showing a registration screen of the gateway device, the registration screen being used to register a user and a book marker that the user has; 
         FIG. 9  is a flow chart showing an example of a contents searching process according to the present invention; 
         FIG. 10  is a schematic diagram showing an example of a display screen of the gateway device according to the first embodiment of the present invention; 
         FIGS. 11A and 11B  are schematic diagrams showing an example of the structure of the book marker; 
         FIG. 12  is a schematic diagram showing an example of the appearance of a cradle to which the book mark was mounted; 
         FIGS. 13A ,  13 B, and  13 C are schematic diagrams showing an example of members that appears on the displaying portion in the case that entries of time information are being transmitted; 
         FIGS. 14A and 14B  are schematic diagrams showing a modification of the book marker; 
         FIGS. 15A and 15B  are schematic diagrams showing another modification of the book marker; 
         FIGS. 16A and 16B  are schematic diagrams showing another modification of the book marker; 
         FIG. 17  is a schematic diagram showing another modification of the book marker; 
         FIG. 18  is a schematic diagram showing another modification of the book marker; 
         FIG. 19  is a schematic diagram showing another modification of the book marker; 
         FIG. 20  is a first part of a flow chart showing a process after the user obtains a book marker until he or she purchases a music CD; 
         FIG. 21  is a second part of the flow chart shown in  FIG. 20 ; 
         FIG. 22  is a schematic diagram showing an example of a time information selection screen displayed on a personal computer in the case that time information was transmitted to the personal computer; 
         FIG. 23  is a schematic diagram showing an example of a search result display screen displayed on the personal computer corresponding to transmitted search results; 
         FIG. 24  is a schematic diagram showing an example of a musical piece demonstration screen displayed on the personal computer; 
         FIG. 25  is a schematic diagram showing an example of a musical piece information saving screen displayed on the personal computer; 
         FIG. 26  is a schematic diagram showing an example of a shopping cart screen for displaying the contents of a shopping cart; 
         FIG. 27  is a schematic diagram showing an example of a purchasing screen displayed in the case that the personal computer is accessed to a web site on which the user can purchase a music CD; 
         FIG. 28  is a block diagram showing an example of the structure of a searching system according to a second embodiment of the present invention; and 
         FIG. 29  is a schematic diagram showing a money flow that takes place according to the second embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Next, the present invention will be described in detail. First of all, an outline of the present invention will be described.  FIG. 1  shows an outlined structure of an information searching system according to the present invention. Referring to  FIG. 1 , the information searching system comprises two databases  1  and  2 , a search engine  3 , and an auxiliary terminal unit  4 . The search engine  3  searches the databases  1  and  2 . The auxiliary terminal unit  4  assists the user for search conditions. 
     The database  1  stores information about contents that were broadcast from broadcasting mediums such as radio broadcasting stations. The database  1  correlatively stores musical piece names that were broadcast from radio broadcasting stations, time information representing time at which these musical pieces were broadcast, and broadcasting station information representing the broadcasting stations that broadcast these musical pieces. The database  1  may store information about contents of other broadcasting mediums. The contents may be commodity information as well as musical pieces. 
     The database  1  correlatively stores musical piece names and additional information thereabout. The additional information about each musical piece is composed of for example a music CD number, CD title information, information of a performer and a composer, the words, a guidance, and so forth. The additional information of each musical piece may be stored to another database that can be searched from the search engine  3 . 
     In this example, it is assumed that the broadcasting medium is a radio broadcasting station and that contents provided by the broadcasting medium are musical pieces. 
     The database  2  stores information about contents stored in the database  1 . When contents are musical pieces that were broadcast from a broadcasting medium, information about contents (for example, an album (CD) name, performer information, a seller, and a released date) is correlated with musical piece names and stored. The database  2  can also store customer information of the system. The database  2  stores customer ID information unique to each auxiliary terminal unit  4  (that will be described later) and other information about each customer. 
     The search engine  3  searches information from the database  1  corresponding to a search condition designated by the user. In this example, the engine represents a structure of a block that provides the user with a particular function. The search engine  3  provides the user with a particular searching function. 
     When the user likes a musical piece that was broadcasted from a radio broadcasting station, if he or she knows the radio broadcasting station, the location, and the broadcast time, he or she designate location information  5 , broadcasting station information  6 , and time information  7  as search conditions to the search engine  3 . The search engine  3  searches the database  1  corresponding to the designated search conditions and outputs for example a musical piece name as the search results. In addition, the search engine  3  searches the database  2  using the musical piece name as a search condition and outputs an album name, a seller name, performer name information, and so forth of the musical piece. The search results of the database  2  are supplied to the user. 
     On the other hand, when the user wants to search a desired musical piece that was broadcast from a radio broadcasting station, he or she may not know the information  5 ,  6 , and  7  or ambiguously knows them. However, according to the present invention, the user has the auxiliary terminal unit  4  that can obtain time information  7 . In addition, the location information  5  and the broadcasting station information  6  of the user are pre-stored as customer information to the database  2 . 
     In other words, when the user likes a musical piece that was broadcast, he or she operates the auxiliary terminal unit  4  so as to store time information  7 ′ at which the musical piece was broadcast. Thereafter, the user causes the search engine  3  to search a musical piece corresponding to the time information  7 ′. The search engine  3  searches the database  1  corresponding to the time information  7 ′, the location information  5 , and the broadcasting station information  6  (the information  5  and  6  have been stored in the database  2 ). The search engine  3  searches the database  2  corresponding to a musical piece name obtained as the search results. The search results are supplied as alternatives of user&#39;s desired information to the user. 
     According to the system of the present invention, when the user likes a musical piece that was broadcast, he or she can obtain desired information by causing the auxiliary terminal unit  4  to store the time information  7 ′. 
     Next, a first embodiment of the present invention will be described.  FIG. 2  shows an example of the structure of a musical piece data searching system. In  FIG. 2 , similar portions to those in  FIG. 1  are denoted by similar reference numerals and their description is omitted. The database  1 , the database  2 , and the search engine  3  compose a book mark search engine  10 . The book mark search engine  10  is connected to another web site (not shown) through a communication line such as Internet. 
     A web site is a place from which information is published to the network. The book mark search engine  10  is one web site. For example, the book mark search engine  10  is connected to a database (not shown) as another web site. The location of a web site is represented with address information referred to as URL (Uniform Resource Locator). 
     A broadcasting station  12  is for example a radio broadcasting station. The broadcasting station  12  broadcasts for example musical pieces as contents corresponding to a pre-created play list. The play list may be created after the contents were broadcast. Information such as commodity information other than musical pieces may be broadcast as contents. The broadcasting station  12  may be a television broadcasting station that wirelessly or non-wirelessly broadcasts TV program, a CATV (Cable Television), or a non-wireless broadcasting station that mainly broadcasts musical pieces. 
     The book mark search engine  10  and the broadcasting station  12  are connected through a communication line such as Internet. The above-described play list is transmitted from the broadcasting station  12  to the book mark search engine  10 . The book mark search engine  10  stores the received play list to the database  1 .  FIG. 3  shows an example of a play list. In the example shown in  FIG. 3 , for example one musical piece as contents that was broadcast is correlated with the name of the broadcasting station  12  that broadcast the contents (Station Name), the broadcasting area of the broadcasting station  12  (Area), the broadcast start time of the contents (musical pieces) (Start Time), the broadcast end time of the contents (End Time), and the contents name (Content). 
     A play list stored in the database  1  is not always transmitted from the broadcasting station  12 . In other words, a play list may be manually created using information of broadcast programs. The created play list may be stored to the database  1  through a predetermined storage medium. Alternatively, a play list may be created by another system other than a broadcasting station and transmitted to the book mark search engine  10 . The database  1  can store a plurality of play lists of different broadcasting stations in such a manner that they are identified. 
     The book mark search engine  10  and a gateway device  11  are bidirectionally connected through a communication line  8  such as Internet. As will be described later, the gateway device  11  is for example a personal computer. The gateway device  11  can bidirectionally communicate with the book mark search engine  10 . In addition, the gateway device  11  can communicate with the auxiliary terminal unit  4  that the user has. 
     The gateway device  11  is not limited to a personal computer. For example, the gateway device  11  may be a set top box used to connect a television receiver and a digital network. As another example, the gateway device  11  may be an IRD (Integrated Receiver Decoder) that is a digital broadcasting receiver. In addition, the gateway device  11  is not limited to a device that can be used by individuals. For example, an information terminal unit that is installed as a public terminal unit in a retail store may be used as the gateway device  11 . 
       FIG. 4  shows an example of the appearance of the auxiliary terminal unit  4  according to the first embodiment of the present invention. Hereinafter, the auxiliary terminal unit  4  is referred to as book marker  4 . The book marker  4  has an inputting portion  20  and a displaying portion  21 . The inputting portion  20  is composed of for example buttons. The displaying portion  21  displays the current time. In addition, the book marker  4  has a connector  22  that is an electric connecting point used to communicate with the gateway device  11 . 
     The book marker  4  is simply structured as will be described later. For example, the book marker  4  may be contained in a small case that can be used as a key holder. As another example, the book marker  4  may be built in various types of electronic devices. As will be described later, the book marker  4  may be built in a radio receiver. In addition, the book marker  4  may be built in a car stereo system of an automobile. Of course, the book marker  4  may be built in other than electronic devices. The book marker  4  may be preferably built in a portable device or a device that can be portably used. 
       FIG. 5  shows an example of the structure of the book marker  4  according to the first embodiment of the present invention. In  FIG. 5 , a CPU (Central Processing Unit)  25  has a memory, a bus, a particular interface, and so forth (that are not shown). A button  20 , a displaying portion  21 , a memory  26 , a timer  28 , an interface  29 , and a ROM (Read Only Memory)  91  are connected to the CPU  25 . The timer  28  outputs the current time. Under the control of the CPU  25 , the current time can be adjusted. The displaying portion  21  is composed of for example an LCD (Liquid Crystal Display). The displaying portion  21  is controlled by the CPU  25 . Time information is supplied from the timer  28  to the displaying portion  21  under the control of the CPU  25 . The displaying portion  21  may be omitted. 
     The ROM  91  pre-stores a program that causes the book marker  4  to be controlled. The CPU  25  controls the operation of the book marker  4  corresponding to the program stored in the ROM  91 . The CPU  25  controls the operations of the displaying portion  21 , the button  20 , the communication through the interface  29 , the access control of the memory  26 , and so forth. 
     The CPU  25  detects the operation of the button  20  performed by the user. Time information at which the button  20  is operated is stored to the memory  26  corresponding to the output of the timer  28 . As shown in  FIG. 6 , a plurality of entries of time information can be stored to the memory  26 . Each entry of time information is assigned to a unique sequence number. A terminal ID  27  is stored at a particular area of the memory  26 . The terminal ID  27  is a unique ID that identifies the book masker  4 . 
     In the above-described example, information stored in the memory  26  corresponding to the operation of the button  20  is time information and identification information that identifies each entry of the time information. However, the present invention is not limited to such an example. In other words, time information and category information thereof can be stored to the memory  26 . When the user operates the button  20 , the CPU  25  determines whether the user momentarily presses the button  20  once, presses the button  20  twice in a predetermined time period, or continuously presses the button  20  for a predetermined time period or longer. Corresponding to the detected results, the CPU  25  generates category information and stores the category information, the identification information, and the time information to the memory  26 . 
     For example, when the user momentarily presses the button  20  once, the CPU  25  determines that he or she has operated the book marker  4  for a radio broadcast. When the user presses the button  20  twice in a predetermined time period, the CPU  25  determines that he or she has operated the book marker  4  for a television broadcast. When the user continuously presses the button  20  for a predetermined time period or longer, the CPU  25  determines that he or she has operated the book marker  4  for an out-of-area. The CPU  25  generates a flag corresponding to the category information. The flag, the time information, and the identification information are correlatively stored in the memory  26 . 
     The interface  29  controls a communication with the outside of the connector  22  (namely, with the gateway device  11 ). The interface standard of the interface  29  that communicates with the gateway device  11  is not limited. For example, USB (Universal Serial Bus) can be used as an interface standard for a communication between the book marker  4  and the gateway device  11 . Alternatively, an interface standard defined as IEEE-1394 may be used. In addition, RS-232C may be used as an interface standard for a communication between the book marker  4  and the gateway device  11 . 
     In addition, as was described above, the communication interface is not limited to a non-wireless interface. For example, using an infrared ray signal corresponding to IrdA (Infrared Data Association) interface standard, a communication can be made between the book marker  4  and the gateway device  11 . In this case, each of the connector  22  and the interface  29  should have transmitting/receiving functions for an infrared ray signal. 
     In addition, the book marker  4  may be structured as an IC card having an IC (Integrated Circuit) and a communicating means or a PC card corresponding to PCMCIA (Personal Computer Memory Card International Association) standard or JEIDA (Japan Electronic Industry Development Association) standard. When the book marker  4  is structured as an IC card, an interface standard corresponding to the IC card is used as the interface  29 . When the book marker  4  is structured as a PC card, a connector corresponding to the PC card is used for the gateway device  11 . When the book marker  4  as a PC card is directly attached to the connector corresponding to the PC card, a communication can be made between the book marker  4  and the gateway device  11 . 
     The terminal ID  27  stored in the memory  26  and the time information can be read from the memory  26  and output to the outside through the interface  29  under the control of the CPU  25 . 
       FIG. 7  shows an example of the structure of the gateway device  11 . As was described above, the gateway device  11  may be a conventional personal computer. In  FIG. 7 , a conventional personal computer is used as the gateway device  11 . Referring to  FIG. 7 , a CPU  31 , a ROM (Read Only Memory)  32 , a RAM (Random Access Memory)  33 , a display controlling circuit  34 , and a storage medium (for example, a hard disk  36 ) are connected to a bus  30 . In addition, an inputting means  91  that outputs a control signal corresponding to user&#39;s operation is connected to the bus  30 . The inputting means  91  is composed of for example a keyboard and a predetermined pointing device (such as a mouse). The CPU  31  operates corresponding to a program stored in the ROM  32  and the hard disk  36 . Corresponding to user&#39;s operation against the inputting means  91 , the CPU  31  performs a predetermined operation. The RAM  33  is used as a work memory of for example the CPU  31 . A display control signal that is output from the CPU  31  is supplied to the display controlling circuit  34 . The display controlling circuit  34  causes a display  35  to display data corresponding to a display control signal. 
     In addition, an interface  37  that communicates with the book marker  4  is connected to the bus  30 . The interface  37  complies with an interface standard corresponding to the interface  29  of the book marker  4  (for example, USB, IEEE-1394, RS-232C, IrDA, or the like). 
     In addition, a communicating means  38  is connected to the bus  30 . The communicating means  38  communicates with the book mark search engine  10  through the communication line  8 . The communicating means  38  is for example a modem. The communicating means  38  is connected to a public telephone line as the communication line  8 . The gateway device  11  is connected to Internet with for example a modem through the public telephone network. In addition, the gateway device  11  can bidirectionally communicate with the book mark search engine  10  through Internet. 
     An audio processing means  39  is connected to the bus  30 . The audio processing means  39  converts digital audio data supplied through the bus  30  into an analog audio signal. The analog audio signal that is output from the audio processing means  39  is reproduced by for example a speaker  90 . 
     As was described above, the user should pre-register his or her information to the database  2  of the book mark search engine  10 . The user information can be registered using the gateway device  11 . First of all, the user connects the book marker  4  to the gateway device  11  through a predetermined interface. The user operates the gateway device  11  so as to register himself or herself and the book marker  4  to the customer database  2 . 
       FIG. 8  shows an example of fields on a registration screen  40  of the display  35  in the case that the user registers himself or herself and his/her book marker  4  to the customer database  2 . A “name” field  41  is used to input the name of the user. A “book mark ID” field  42  is used to input the terminal ID  27  of the user&#39;s book marker  4 . 
     The above-described terminal ID  27  is input by a communication between the gateway device  11  and the book marker  4 . In other words, a request for the terminal ID  27  is transmitted from the gateway device  11  to the book marker  4 . The book marker  4  reads the terminal ID  27  from the memory  26  under the control of the CPU  25  corresponding to the request. The terminal ID  27  is transmitted to the gateway device  11 . The gateway device  11  causes the display  35  to display the received terminal ID  27  at the “book mark ID” field  42 . In addition, the gateway device  11  causes the RAM  33  to store the received terminal ID  27 . 
     A “zip code” field  43  and a “area code” field  44  are used to input the zip code and the area code of the public telephone line of the user. Corresponding to the contents that was input to the fields  43  and  44 , the user&#39;s area is represented. With respect to the user&#39;s area, information that represents a geographical area can be input instead of the zip code and the area code. Alternatively, an area name that was designated may be input. A “radio station” field  45  is used to input information that identifies user&#39;s favorite radio station. In this example, although a broadcasting station name was input, a frequency band of a radio broadcasting station may be input. 
     A “card number” field  46  is used to input user&#39;s credit card number, user&#39;s bank card number, or the like. An “address” field  47  is used to accurately input the user&#39;s address. These fields are used when a service using the book marker  4  requires a charging process. 
     Each piece of information that is input to the fields  41  to  47  is stored to the RAM  33 . The information is read from the RAM  33  corresponding to a predetermined operation. The information that is read from the RAM  33  is transmitted to the book mark search engine  10  by the communicating means  38 . At this point, each information to be transmitted is preferably encrypted corresponding to a predetermined encrypting method. 
     On the other hand, the timer  28  is adjusted by the book marker  4 . For example, when the terminal ID  27  is registered, the book marker  4  and the gateway device  11  are connected. At this point, the book marker  4  and the gateway device  11  are bidirectionally communicated. Using time information that is output from a timer (not shown) of the gateway device  11 , the timer  28  of the book marker  4  can be adjusted. 
     Such a process can be performed by a uni-directional communication from the book marker  4  to the gateway device  11 . In this case, the book marker  4  and the gateway device  11  are connected. The terminal ID  27  is transmitted from the book marker  4  to the gateway device  11 . In addition, time information of the timer  28  is transmitted from the book marker  4  to the gateway device  11 . The gateway device  11  compares the transmitted time information with time information represented by the timer (not shown) of the gateway device  11 . Corresponding to the difference, the correct time may be calculated. 
     In these cases, the time information of the timer (not shown) of the gateway device  11  should be adjusted to correct time by a proper manner. 
     In the above-described example, the book marker  4  has a timer. However, it should be noted that the present invention is not limited to such an example. In other words, a counter that operates with a clock signal having a predetermined period may be disposed in the book marker  4 . Corresponding to the count value of the counter, time information that represents the time at which the button  20  was pressed can be obtained. For example, the count value at which the user pressed the button  20  is stored to the memory  26 . When the book marker  4  is connected to the gateway device  11  and the count value stored in the memory  26  is transmitted to the gateway device  11 , the count value at which the count value was transmitted is also transmitted to the gateway device  11  in addition to the count value that was read from the memory  26 . 
     On the other hand, the gateway device  11  adjusts the timer (not shown) in a predetermined manner and obtains a master clock. For example, the communicating means  38  communicates with the book mark search engine  10  through the communication line  8 , obtains time information, and adjusts the timer of the gateway device  11  corresponding to the time information. In addition, a predetermined receiving means may be disposed in the gateway device  11 . The receiving means may receive time information contained in a television broadcast or a radio broadcast. Corresponding to the received time information, the timer of the gateway device  11  may be adjusted. 
     The gateway device  11  obtains the difference between the count value at which the user pressed the button  20  and the count value at which time information was transmitted from the book marker  4 . When the count up period of the counter of the book marker  4  is known, the time is traced back from the time at which time information was transmitted from the book marker  4  by the count value of the difference corresponding to the timer of the gateway device  11 . Thus, the time at which the user pressed the button  20  of the book marker  4  and the count value was stored to the memory  26  can be accurately obtained. 
     According to this method, it is not necessary to dispose a clock (timer  28 ) and the displaying portion  21  that displays time in the book marker  4 . This method is preferable because it is not necessary to adjust the timer  28  of the book marker  4 . 
     When the book marker  4  is provided with a counter instead of a timer, the count value of the counter corresponds to time information. 
     In the case that the book marker  4  is connected to the gateway device  11 , when the gateway device  11  measures the count value of the counter of the book marker  4  at an interval of a predetermined time period, the period of the counter of the book marker  4  can be obtained. 
     In the above-described example, the counter counts with a clock signal having a predetermined period. However, it should be noted that the present invention is not limited to such an example. When the counter value is correlated with the counter start time, the counter can be operated with a clock signal that is generated at any timing. For example, the counter may be operated with an M sequence clock signal generated by a shift register and an exclusive-OR circuit. Alternatively, by periodically varying the period of a clock signal, the counter can be accomplished. Of course, the gateway device  11  should know the type of the counter used in the book marker  4 . When such a clock signal is used for the counter, the book marker  4  can be prevented from illegally being fabricated or used. 
     In the above-described example, the time at which the button  20  was pressed on the book marker  4  is obtained with the gateway devise  11 . However, it should be noted that the present invention is not limited to such an example. In other words, the gateway device  11  obtains first time information that represents the time at which the button  20  was pressed on the book marker  4  and second time information that represents the time at which the first time information was transmitted from the book marker  4  to the gateway device  11 , transmits the first time information and the second time information to the book mark search engine  10 , and obtains the accurate time at which the button  20  was pressed corresponding to the master clock of the book mark search engine  10 . 
     The timer  28  of the book marker  4  or the above-described counter may operate as a stop watch. In other words, when the button  20  is operated, the timer  28  or the counter starts counting. Thus, when time information (or count value) is transmitted from the book marker  4  to the gateway device  11 , the timer  28  or the counter is reset and stopped. When the button  20  is operated next time, the timer  28  or the counter starts operating. In such a manner, the power consumption of the book marker  4  can be reduced. 
     Next, with reference to a flow chart shown in  FIG. 9 , the contents searching process of the system shown in  FIG. 2  will be described. First of all, at step S 10 , in the above-described manner, the terminal ID  27  of user&#39;s book marker  4  is registered to the book mark search engine  10 . 
     The user can store time information to the book marker  4  with the terminal ID  27  at any place (for example, on the street or in the car). When the user likes a musical piece that he or she is listening on the radio, he or she presses the button  20  of the book marker  4 . Time information at which the button  20  was pressed is stored to the memory  26  of the book marker  4  (at step S 11 ). A plurality of entries of time information can be stored to the memory  26  of the book marker  4  as long as it has a free space (at step S 12 ). 
     At step S 13 , the book marker  4  and the gateway device  11  (abbreviated as G·D in  FIG. 9 ) are connected. At step S 14 , time information stored to the memory  26  of the book marker  4  is read along with the terminal ID  27 . The time information is transmitted to the gateway device  11  through a predetermined interface. At step S 14 , the transmitting process is automatically performed after the book marker  4  and the gateway device  11  are connected. At step S 15 , the time information and the terminal ID  27  that were transmitted from the book marker  4  to the gateway device  11  are transmitted to the book mark search engine  10  through the communication line  8 . 
     At step S 16 , the book mark search engine  10  searches information corresponding to the time information and the terminal ID  27  transmitted from the gateway device  11 . As a search condition, time information is used. When the user wants to know musical piece information, it is searched from the database  1  corresponding to the time information. Corresponding to play lists of broadcasting stations stored in the database  1 , musical piece names of musical pieces that were broadcasted from the radio broadcasting stations at the time represented by the time information are output. 
     When the searching process is performed at step S 16 , the search condition is narrowed corresponding to the user&#39;s information registered at step S 10 . Corresponding to the terminal ID  27  transmitted from the gateway device  11 , the database  2  is searched. As a result, the user&#39;s registration information as the terminal ID  27  is output. The registration information is used as another search condition. 
     At this point, only a play list of a particular broadcasting station is searched from the database  1  corresponding to broadcasting station information that was input in the “radio station” field  45  when the terminal ID  27  was registered to the book mark search engine  10  at step S 10 . 
     After the play list was searched (at step S 17 ), the search results are supplied to the user. In other words, the search results of the book mark search engine  10  are transmitted to the gateway device  11 . The gateway device  11  displays the transmitted search results on a display screen (that will be described later). Thus, the user can know whether or not user&#39;s desired information was obtained (at step S 18 ). 
     When the search results do not contain user&#39;s desired information, a relevant message is transmitted from the gateway device  11  to the book mark search engine  10 . At step S 19 , with a changed search condition, the database  1  is searched. For example, as a search condition, broadcasting stations are searched corresponding to information that was input in the “zip code” field  43  and the “area code” field  44 . Alternatively, broadcasting stations may be searched corresponding to adjacent areas of the area represented by the fields  43  and  44 . 
     When the database  1  is searched again at step S 19 , a search condition may be automatically designated by the book mark search engine  10 . For example, at step S 10 , the bookmark search engine  10  may designate information registered by the user as a search condition one after the other. When the database  1  is searched again, the user may designate a search condition. In this case, the user inputs a new search condition to the gateway device  11 . The input search condition is transmitted from the gateway device  11  to the book mark search engine  10 . 
     When user&#39;s desired information was searched, the flow advances to step S 20 . At step S 20 , the searched information is transmitted from the book mark search engine  10  to the gateway device  11 . When information about a musical piece is searched, audio data of the searched musical piece is transmitted from the book mark search engine  10  to the gateway device  11 . Audio data of musical pieces can be stored to the database  2 . Alternatively, the user can request another web site connected to for example Internet to transmit audio data of a musical piece. 
     The user can cause the hard disk  36  of the gateway device  11  to store received audio data and the audio processing means  39  and the speaker  90  to reproduce the audio data. When the user likes the reproduced musical piece, he or she can cause the gateway device  11  to communicate with the book mark search engine  10  and request to purchase an album (CD) that contains the musical piece. 
       FIG. 10  shows an example of a screen of the gateway device  11  (this screen is displayed at and after step S 18 ). At upper positions of the screen, a user name  51 , a terminal ID  27 , and an area  52  appear as user&#39;s registered information. The area  52  is omitted as an input field on the registration screen shown in  FIG. 8 . In the example shown in  FIG. 10 , three radio broadcasting stations “AAAA”, “BBBB”, and “CCCC” and one CATV (Cable Television) broadcasting station “DDD” have been registered. 
     Search results of four broadcasting stations by the book mark search engine  10  corresponding to one entry of time information  53  registered to the book marker  4  appear as search results  54 ,  55 ,  56 , and  57 . In this example, musical pieces were broadcast from the broadcasting stations “AAAA”, “BBBB”, and “DDD” at the time represented by the time information  53 . On the other hand, an advertisement was broadcast from the broadcasting station “CCCC” at the time represented by the time information  53 . For example, the search result  54  for the broadcasting station “AAAA” contains a CD jacket image  54 A, a program name-singer name  54 B, and a CD sales price  54 C. The CD jacket image  54 A appears below a broadcasting station name and broadcasting frequency band information. The CD jacket image  54 A shows a jacket image of a CD that contains a musical piece that was broadcast at the time represented by the time information  53  from the broadcasting station “AAAA”. 
     Below the CD sales price  54 C, buttons  58 ,  59 , and  60  appear as virtual operation buttons operated with a user interface of the gateway device  11 . The buttons  58 ,  59 , and  60  are in common with each broadcasting station that broadcast musical pieces. When the user operates the button  58 , audio data of the musical piece is transmitted from the book mark search engine  10  to the gateway device  11 . The audio data is processed by the audio processing means  39  and then reproduced from the speaker  90 . When the user operates the button  58 , the transmitted audio data is not stored to a predetermined storing device (for example, the hard disk  36 ). 
     With reference to the jacket image  54 A, the musical piece name—singer name  54 B, the audio data of the musical piece, and so forth, the user can select a desired musical piece from those that were broadcast from the registered broadcasting stations. 
     The button  59  is used when the user wants to purchase a CD that contains a desired musical piece. The button  60  is used to download and store audio data of a desired musical piece to for example the hard disk  36 . When the user purchases a CD or downloads audio data using the button  59  or  60 , the fee of the CD or audio data is charged to the credit card or bank card corresponding to the information that was input to the “card number” field  46  shown in  FIG. 8 . 
     In the example shown in  FIG. 10 , the buttons  58 ,  59 , and  60  do not appear for the advertisement that was broadcast from the broadcasting station “CCCC”. Alternatively, a button that allows the user to purchase a commodity item of the advertisement may be additionally placed. 
     When there are many registered broadcasting stations, search results may not appear at a time. In this case, by operating a button  61 , information of other registered broadcasting stations appears. 
     In the above-described example, the book marker  4  was described as a dedicated device that stores time information. However, it should be noted that the present invention is not limited to such an example. For example, a portable communication device such as a portable telephone unit or a PHS (Personal Handy Phone System) unit may be provided with the function of the book marker  4 . The button  20  can be disposed on the device along with dial keys and so forth. The telephone number of the device can be used as the terminal ID  27 . In a combination of the dial keys, the function of the button  20  can be accomplished. Likewise, a GPS (Global Positioning System) may be provided with the function of the book marker  4 . When a device such as a PHS unit or a GPS unit that has a function for detecting the position thereof is provided with the function of the book marker  4 , since the position of the user can be located, broadcasting stations and so forth can be more narrowly searched. 
     In addition, a small portable information device referred to as PDA (Personal Digital Assistant) can be used as the book marker  4 . In this case, the PDA is provided with the function of the book marker  4  as software. The PDA virtually operates as the book marker  4 . 
     In addition, a portable telephone unit that can subscribe to an Internet connection service can be used as the gateway device  11 . For example, the book marker  4  may be structured as a strap for holding a portable telephone unit. In this case, one end of the strap is structured as the connector  22 . The other end is connected to the portable telephone unit. A portable telephone unit that can subscribe to an Internet connection service is provided with a connector that allows data to be transmitted to Internet. When time information stored in the book marker  4  structured as a strap is transmitted to the portable telephone unit as the gateway device  11 , the connector  22  disposed at an end of the strap is connected to a lower connector of the portable telephone unit. When the portable telephone unit is connected to Internet, time information can be easily transmitted from the gateway device  11  to the book mark search engine  10 . 
     As a modification of the first embodiment, the button  20  can be accomplished with software on the gateway device  11 . The function of the button  20  for storing time information is assigned to a predetermined key of the gateway device  11  or a predetermined position of the display screen thereof. Likewise, the function of the button  20  may be assigned to a predetermined icon on the display screen of the gateway device  11 . When an icon assigned the function of the button  20  is operated by a pointing device such as a mouse, time information can be stored. The terminal ID  27  is stored to a predetermined area of the ROM  32 , the RAM  33 , or the hard disk  36  of the gateway device  11 . 
     When the user operates an icon assigned as the button  20  on the gateway device  11 , time information that represents the time at which the icon was operated is stored to a predetermined area of the RAM  33  or the hard disk  36 . The time information is read from the RAM  33  or the hard disk  36  and transmitted along with the terminal ID  27  to the book mark search engine  10  through the communication line  8 . The book mark search engine  10  searches the database corresponding to the transmitted information and transmits search results from the book mark search engine  10  to the gateway device  11  through the communication line  8 . 
     When the searching operation is performed by the book mark search engine  10 , a unique terminal ID  27  is supplied to each book marker  4 . Corresponding to the terminal ID  27  and time information, since the user name and the musical piece name that he or she downloaded are obtained and used for market research. 
     Next, practical examples of the book marker  4  will be described. As long as the book marker  4  can store time information at user&#39;s desired timing, various modifications are available. 
       FIGS. 11A and 11B  show an example of the book marker  4 . As shown in  FIG. 11A , in this example of the book marker  4 , cut portions  101  and  102  are formed at both ends of the book marker  4 . When a string or a chain is connected to the cut portion  101  or  102 , the user can wear the book marker  4  as a pendant. The displaying portion  21  is disposed at an almost center position of the book marker  4 . The button  20  is disposed below the displaying portion  21 . 
     The cut portion  101  composes a cap  103 . The connector  22  that is connected to the gateway device  11  is housed in the cap  103 . When the cap  103  is pulled upward, as shown in  FIG. 11B , the cap  103  is separated from the main body of the book marker  4 . Thus, the connector  22  is exposed. In other words, the connector  22  directly protrudes from the main body of the book marker  4 . In this example, the interface  29  of the book marker  4  is an interface corresponding to USB. The connector  22  is a male USB connector. 
     Since the connector  22  directly protrudes from the main body of the book marker  4 , when the connector  22  of the main body of the book marker  4  is inserted into a female connector of the interface  37  of the gateway device  11 , the book marker  4  can be connected to the gateway device  11 . If an A type USB connector is used, the compatibility between the book marker  4  and the gateway device  11  as a personal computer can be preferably maintained. 
     Depending on the structure around the connector of the gateway device  11 , the main body of the book marker  4  may not be physically connected to the gateway device  11 . Thus, in this case, a connecting device that has a female USB connector and a connecting line for the gateway device  11  is used. The connecting device is referred to as cradle.  FIG. 12  shows an example of the appearance of the cradle  110  to which the book marker  4  has been connected. 
     The cradle  110  is formed in a semi-sphere shape. At the vertex portion of the cradle  110 , a female connector  111  corresponding to the connector  22  (male connector) of the book marker  4  is disposed. It should be noted that the shape of the cradle  110  is not limited to such a semi-sphere. In other words, according to the preset invention, the shape of the cradle  110  may be rectangular parallelopiped, quadrangular pyramid, or any complicated shape. A connecting line  112  extends from the female connector  111 . The connecting line  112  is used to connect the cradle  110  to the gateway device  11 . 
     By connecting the connecting line  112  to a predetermined connector of the gateway device  11 , inserting the connector  22  of the book marker  4  into the female connector  111  of the cradle  110 , and then mounting the book marker  4  to the cradle  110 , time information stored in the memory  26  of the book marker  4  can be transmitted to the gateway device  11 . 
     Entries of time information stored in the book marker  4  appear as ball shaped members  100 ,  100 ,  100 , . . . and  100 ′ under the control of the CPU  25 . As was described above, the book marker  4  generates category information corresponding to time information that depends on the operating method of the button  20 . The time information and the category information can be stored in the memory  26 . The category information can be affected to the time information that appears on the displaying portion  21 . 
     In the example, as shown in  FIGS. 11A and 11B , black ball shaped members  100  and white ball shaped members  100 ′ represent category information. A black ball shaped member  100  represents an operation of the button  20  corresponding to a radio broadcast. A white ball shaped member  100 ′ represents an operation of the button  20  corresponding to a television broadcast. Another member (not shown) represents an operation of the button  20  corresponding to out-of-area. 
     Of course, entries of time information may appear as other members, not black and white ball shaped members. For example, entries of time information may appears as a number. In addition, the number of entries of time information that can be stored to the book marker  4  may appear. 
     Members that appears on the displaying portion  21  may vary when entries of time information stored in the memory  26  of the book marker  4  are transmitted to the gateway device  11 .  FIGS. 13A ,  13 B, and  13 C show an example of members that appear on the displaying portion  21  in the case that entries of time information are being transmitted to the gateway device  11 .  FIGS. 13A ,  13 B, and  13 C show the case that the cap  103  shown in  FIGS. 11A and 11B  faces downward.  FIGS. 13A ,  13 B, and  13 C show states that time passes. In  FIG. 13A , seven ball shaped members  100  and  100 ′ successively disappear as they are sucked toward the connector  22  as time passes. Thus, a situation of which data stored in the memory  26  is transmitted to the gateway device  11  through the connector  22  appears as a virtual image. 
     Such an virtual image may appear on the gateway device  11 . When an audio reproducing portion is disposed in the gateway device  11 , a sound can be output as members vary and time passes. Actually, time information is transmitted in much shorter time than members that disappears on the displaying portion  21 . In other words, it is not necessary to synchronize the real data transmission speed with the speed of members that disappear on the displaying portion  21 . When entries of time information stored in the memory  26  are transmitted, as time passes, members decrease and/or a sound takes place. Thus, the user can visually know that entries of time information are being transmitted to the gateway device  11 . 
     While entries of time information are being transmitted, they can be represented in various manners. For example, a predetermined character image may appear on the gateway device  11 . In addition, members that appears on the displaying portion  21  of the book marker  4  can be synchronized with members that appear on the gateway device  11  so that the user can see a sequence of entries of time information transmitted from the book marker  4  to the gateway device  11 . 
       FIGS. 14A and 14B  show a modification of the book marker  4 . The book marker  4  shown in  FIGS. 14A and 14B  is different from the book marker  4  shown in  FIGS. 11A and 11B  in that the lower cut portion  102  is not formed.  FIG. 14A  shows the state that the cap  103  has been mounted.  FIG. 14B  shows the state that the cap  103  has been dismounted and the connector  22  has been exposed. In the modification shown in  FIGS. 14A and 14B , the button  20  can be pressed from the bottom. 
       FIGS. 15A and 15B  show another modification of the book marker  4 . The book marker  4  shown in  FIGS. 15A and 15B  is different from the book marker  4  shown in  FIGS. 11A and 11B  in that members that represent entries of time information of the displaying portion  21  are formed as bars  120 .  FIG. 15A  shows the state that the cap  103  has been mounted.  FIG. 15B  shows the state that the cap  103  has been removed and the connector  22  has been exposed. 
       FIGS. 16A and 16B  show another modification of the book marker  4 . The book marker  4  shown in  FIGS. 16A and 16B  is different from the book marker  4  shown in  FIGS. 11A and 11B  in that the cut portions  101  and  102  are omitted and a slide-proof portion  130  is disposed. The slide-proof portion  130  is formed on the side of the main body of the book marker  4  and composed of for example rubber. In this example, an area  131  of the displaying portion  21  represents entries of time information.  FIG. 16A  shows the state that the cap  103  has been mounted.  FIG. 16B  shows the state that the cap  103  has been dismounted and the connector  22  has been exposed. 
       FIG. 17  shows another modification of the book marker  4 . In this modification, a ring  150  is disposed to the cap  103  of the book marker  4 . In the state that the cap  103  has been mounted to the book marker  4 , it can be used as for example a key holder. 
     The book marker  4  as each of the modifications shown in  FIGS. 14A ,  14 B,  15 A,  15 B,  16 A,  16 B, and  17  may be mounted to the cradle  110 . 
       FIG. 18  shows another modification of the book marker  4 . In this modification, the book marker  4  is formed in a wrist band shape. The displaying portion  21  is composed of a plurality of lighting portions for example LEDs (Light Emitting Diodes) that light corresponding to entries of time information that are stored. All lighting portions may be initially lit. As the number of entries of time information that are stored increases, the number of the lighting portions that light may decrease. A connecting line  140  protrudes from one end of the main body of the book marker  4 . The connector  22  is disposed at a tail of the connecting line  140 . A structure that allows the connector  22  to be connected and disconnected is disposed at a head of the main body of the book marker  4 . When the connector  22  is connected to the head of the book marker  4 , it is formed in a ring shape. 
       FIG. 19  shows another modification of the book marker  4 . The book marker  4  shown in  FIG. 19  is used as a desk top device such as a table clock. The button  20  is disposed at an upper position of the book marker  4 . The displaying portion  21  is disposed on the front surface of the book marker  4 . In this modification of the book marker  4 , entries of time information that were stored appear as square members  160  and  160 ′. For example, a black square member  160  represents an entry of time information corresponding to a radio broadcast. A white square member  160 ′ represents an entry of time information corresponding to a television broadcast. The square members  160  and  160 ′ appear at random positions. The connector  22  connected to the gateway device  11  is disposed on a rear surface (not shown) of the book marker  4 . In this modification of the book marker  4  shown in  FIG. 19 , a female USB connector may be disposed on the book marker  4 . With a connecting line having two male connectors, the book marker  4  may be connected to the gateway device  11 . 
     The maximum number of entries of time information that are stored to the book marker  4  may be limited. For example, in consideration of searching operations that will be performed later, the number of entries of time information that can be stored to the book marker  4  may be designated to several entries to ten and several entries as an upper limit. In this case, a proper means for informing the user that the number of entries of time information becomes or approaches the upper limit is preferably disposed. For example, a sound generating means that generates a beep sound may be disposed to the book marker  4 . With such a sound generating means, when the number of entries of time information that can be stored to the book marker  4  becomes one, an alarm sound may be generated. When the number of entries of time information that can be stored to the book marker  4  is zero, an alarm sound is generated when the button  20  is pressed. 
     A sound generated by the sound generating means is not limited to such an alarm sound. For example, whenever the user operates the button  20  of the book marker  4 , a predetermined sound may be generated. Thus, the user can know whether or not the operation of the button  20  was acknowledged without need to see the displaying portion  21  of the book marker  4 . In addition, a sound that varies corresponding to the operating method of the button  20  may be generated. 
     A cancel button may be disposed to the book marker  4 . With the cancel button, entries of time information that were stored can be erased in the order of the oldest entry or the latest entry. Alternatively, the user can designate an entry to be deleted from those of time information that were stored. 
     Besides the above-described examples, the book marker  4  can be built in various electronic devices. For example, the book marker  4  can be built in a radio receiver. In addition, the book marker  4  can be built in a car stereo system. Of course, devices in which the book marker  4  is built are not limited to electronic devices. The book marker  4  is preferably built in a device that can be used as a mobile unit. 
     In the above-described examples, the button  20  is disposed as one operating portion for causing time information to be stored to the book marker  4 . By operating the button  20  in various manners, a plurality of category flags are generated. However, it should be noted that the present invention is not limited to such examples. Instead, a plurality of buttons may be disposed to the book marker  4 . Different flags may be assigned to these buttons. For example, a button  20  for a radio broadcast and a button  20 ′ for a television broadcast may be disposed. In addition, in a combination of a plurality of buttons, much more category flags can be generated. 
     The operating portion for storing time information of the book marker  4  is not limited to a push button. Alternatively, a rotating switch that rotatably selects one of contacts may be disposed to the book marker  4 . With the rotating switch, time information may be stored. Alternatively, a touch sensor that defects a touching of the user may be used as the operating portion. 
     In the above-described examples, the book marker  4  and the gateway device  11  are connected through an interface such as USB that allows data to be transmitted to a computer system. However, it should be noted that the present invention is not limited to such an example. In other words, since the amount of data transmitted from the book marker  4  to the gateway device is very small, an interface having the lowest data transmission rate can be used. For example, data can be transmitted using a conventional shield cable that is used for a head set. 
     In addition, the book marker  4  can be accomplished as software of a personal computer. In this case, a personal computer as the book marker  4  may be additionally used. Alternatively, when the gateway device  11  is a personal computer, the gateway device  11  can be used as the book marker  4 . Software that accomplishes the book marker  4  on the personal computer can be downloaded from a communication network such as Internet. Of course, such software can be distributed or sold using a record medium such as a CD-ROM. 
     Such software may be obtained from another web site through the book mark search engine  10  connected to the gateway device  11 . Alternatively, such software may be stored in the book mark search engine  10 . In this case, the software may be directly downloaded from the gateway device  11 . When the user performs a particular operation on a personal computer that executes the software that accomplishes the book marker  4 , time information is stored. 
     Alternatively, the program that causes the book marker  4  to operate may be downloaded. For example, in the book marker  4 , the ROM  91  is composed of an EEROM (Electrically Erasable Programmable ROM) that allows stored contents to be electrically rewritten. The program that is supplied from the gateway device  11  or the like through the interface  29  is stored to the ROM  91 . 
     Thus, in the initial state, the program is not stored to the ROM  91 . The program is written to the ROM  91  corresponding to a predetermined procedure. As a result, the book marker  4  can be used. 
     When the user of the book marker  4  is registered, the book marker  4  is connected to the gateway device  11 . The terminal ID  27  is transmitted from the book marker  4  to the book mark search engine  10  through the gateway device  11 . After the user of the book marker  4  has been correctly registered, a program for controlling the operation of the book marker  4  is transmitted from the book mark search engine  10  to the gateway device  11 . This program is transmitted from the gateway device  11  to the book marker  4  through the interface  29 . The transmitted program is written to the ROM  91 . As a result, the book marker  4  can be used. 
     Alternatively, a startup program for the CPU  25  and a communication control program for the interface  29  can be pre-stored to the ROM  91 . 
     When the ROM  91  is rewritable, the version of the operation control program of the book marker  4  can be updated. For example, a program is downloaded from the network connected to the gateway device  11 . The downloaded program is transmitted to the book marker  4 . As a result, the contents stored in the ROM  91  are rewritten. 
     When the transmitted program can be selected by the user, members that appear on the displaying portion  21  can be preferably selected by the user. 
     The operation control program for the book marker  4  can be transmitted from another site that can be connected to the gateway device  11  as well as the book mark search engine  10 . 
     The control program for the book marker  4  can be distributed using a record medium such as a CD-ROM or a floppy disc, instead of downloading from the network. The program recorded in such a record medium is read by the gateway device  11 . The program is transmitted to the book marker  4 . As a result, the contents stored in the ROM  91  are rewritten. 
     Next, another modification of the first embodiment of the present invention will be described. According to the modification, in addition to user&#39;s personal computer, an information terminal unit that is installed at a retail store is used as the gateway device  11 . 
     Such information terminal units are installed at relatively large CD stores and so-called convenience stores. The information terminal unite are connected to a predetermined network. When the user operates such an information terminal unit corresponding to a menu displayed on the screen thereof, he or she can obtain desired information. The user can see the obtained information and obtain it with a record medium such as a floppy disk or a CD-ROM. In addition, the information terminal unit is provided with a predetermined interface. The obtained information can be directly transferred to user&#39;s information device through a relevant interface. Hereinafter, such an information terminal unit is referred to as “kiosk terminal unit”. 
     Since a kiosk terminal unit can be accomplished with almost the same structure as a conventional computer as shown in  FIG. 7 , the description of the structure of the kiosk terminal unit is omitted. The kiosk terminal unit has a bus to which a CPU and a memory are connected. In addition, a displaying device and an input interface that accomplish GUI (Graphical User Interface) are connected to the bus. The kiosk terminal unit also has a large storage medium such as a HDD, a data outputting means, a network connecting means, and so forth. 
     The kiosk terminal unit is connected to the above-described book mark search engine  10  (the connection is not shown). The kiosk terminal unit is provided with an interface corresponding to the connector  22  of the book marker  4  so that data can be transmitted between the book marker  4  and the kiosk terminal unit. With the kiosk terminal unit, the user can use the searching service using the book marker  4  regardless of whether he or she has the gateway device  11 . 
     The kiosk terminal unit can be always connected to a high speed communication line that has a higher transmission rate than a conventional home-use network. The kiosk terminal unit can have larger storage mediums (that are a memory and a HDD) than User′ personal computer. Thus, when the user uses a kiosk terminal unit, he or she can have a different service from that in the case that a personal computer is used as the gateway device  11 . 
     For example, the book marker  4  is provided with a memory having a relatively large storage capacity. The book marker  4  is connected to a kiosk terminal unit. Corresponding to time information stored in the memory  26 , music data is searched with the kiosk terminal unit. The kiosk terminal unit displays a screen as shown in  FIG. 10 . When the kiosk terminal unit has an audio reproducing means, by operating the button  58 , the user can listen to music data as search results. 
     By operating the button  60 , the user can download music data as search results to the book marker  4  through the connector  22 . In the case that the music data is charged, when the user pays a designated fee through a money slot, the music data as the search results is downloaded to the book marker  4 . The user transfers the downloaded music data from the book marker  4  to a personal computer or a dedicated music data reproducing apparatus. When music data that is downloaded is compression-encoded corresponding to a predetermined compression encoding method, the memory storage space and download time can be preferably reduced. 
     As examples of the compression encoding method for music data, MP3 (Moving Picture Experts Group 1 Audio Layer 3), ATRAC (Adaptive Transform Acoustic Coding), ATRAC2, ATRAC3 (that are modifications thereof) and so forth can be used. As other examples of the compression encoding method, PASC (Precision Adaptive Sub-band Coding), Twin VQ™, Real Audio™, Liquid Audio™, and so forth can be used. 
     When the book marker  4  is provided with a decoder and a audio reproducing means corresponding to a predetermined music data compression encoding method, music data that has been downloaded and stored to the memory can be decoded and reproduced. Thus, the user can enjoy listening to downloaded music data. An example of the audio reproducing means is an audio reproducing system using a head set and so forth. 
     When music data is directly downloaded to the book marker  4 , there may be a problem about copyright. This problem can be solved by using an encrypting system. In the encrypting system, music data is pre-encoded corresponding to a predetermined encoding method. The book marker  4  has a decrypting portion that decrypts encrypted music data. Encrypted music data is decrypted only when it is reproduced by the book marker  4 . Even if music data downloaded to the bock marker  4  is transmitted to a personal computer or the like, the music data cannot be decrypted unless the user has a decrypting key that can be used by the personal computer. 
     In addition, when a retail store that has a kiosk terminal unit sells music CDs, the kiosk terminal unit may issue an order sheet as a search result corresponding to time information stored in the book marker  4 . The user can hand the order sheet to a clerk of the store and buy a mucic CD corresponding to the search result. When the kiosk terminal unit is provided with a cart system that conveys music CDs, the kiosk terminal unit can directly vend a music CD corresponding to a search result. 
     Next, a searching process for music data corresponding to time information stored in the book marker  4  and a purchasing process for a music CD corresponding to the search result according to the above-described embodiments will be described in a practical manner.  FIGS. 20 and 21  are a first part and a second part of a flow chart showing a process performed after the user is registered to the book marker  4  until a music CD is purchased.  FIGS. 22 to 27  show examples of display screens displayed on the gateway device  11  corresponding to the flow chart shown in  FIGS. 20 and 21 . “A” and “B” shown in  FIG. 20  are connected to “A” and “B” shown in  FIG. 21 , respectively. 
     When the user uses the book marker  4 , the user should register himself or herself to it. In  FIG. 20 , at step S 30 , it is determined whether or not the user has been registered. When the determined result at step S 30  is Yes (namely, the user has been registered), the flow advances to step S 33 . When the determined result at step S 30  is No (namely, the user&#39;s book marker  4  has not been registered), the flow advances to step S 31 . At step S 31 , the book marker  4  is connected to the gateway device  11 . At step S 32 , the user is registered to the book marker  4  by a predetermined operation of the gateway device  11 . The gateway device  11  may be user&#39;s personal computer or an above-described kiosk terminal unit. After the user has been registered to the book marker  4 , the flow advances to step S 33 . 
     When the determined result at step S 30  is Yes (namely, the user has been registered to the book marker  4 ), the flow advances to step S 33 . At step S 33 , the book marker  4  is operated by the user. In other words, when the user is listening to his or her favorite musical piece, he or she presses the button  20 . As a result, time information at which the user pressed the button  20  is stored to the book marker  4 . As was described above, depending on in what manner the button  20  was pressed, time information that is stored in the book marker  4  is categorized (at step S 34 ). When time information is stored out of the registered area, the user continuously presses the button  20  for a predetermined time period or longer (at step S 35 ). To store time information corresponding to a radio broadcast to the book marker  4 , the user momentarily presses the button  20  once (at step S 36 ). To store time information corresponding to a television broadcast to the book marker  4 , the user presses the button  20  twice in a predetermined time period (at step S 37 ). Thereafter, the flow advances to step S 38 . At step S 38 , the time information at which the button  20  was pressed, identification information, and the category flag that represents the operating manner of the button  20  are stored to the memory  26  of the book marker  4 . 
     When at least one entry of time information has been stored in the memory  26  of the book marker  4 , the entry of the time information can be extracted from the memory  26  and a musical piece can be searched by the bookmark search engine  10  corresponding to the entry of the time information (at step S 39 ). When the determined result at step S 39  is Yes (namely, a musical piece is searched corresponding to time information), the flow advances to step S 40 . When the determined result at step S 39  is No (namely, time information is further stored to the book marker  4 ), the flow returns to step S 33 . 
     As was described above, the searching operation using time information stored in the book marker  4  is performed when the book marker  4  is connected to user&#39;s personal computer (PC) or a kiosk terminal unit as the gateway device  11 . When the user performs the searching operation using his or her personal computer as the gateway device  11 , the flow advances to step S 41 . At step S 41 , the book marker  4  is connected to the personal computer. In addition, the personal computer is connected to for example Internet. At step S 42 , the book marker  4  is connected to an available web site at which the bookmark search engine  10  can be used. 
     Time information stored in the memory  26  of the book marker  4  is transmitted to the personal computer.  FIG. 22  shows an example of a time information selection screen  200  that is displayed on the personal computer when time information has been transmitted thereto. In this example, entries ( 1 ) to ( 9 ) of time information stored in the book marker  4  are transmitted to the personal computer. The stored date and time of each of the entries ( 1 ) to ( 9 ) of the time information appear as members  201  to  209 . 
     The user selects desired information from the members  201  to  209 . For example, the user selects one of the members  201  to  209  using a pointing device such as a mouse and a cursor that moves on the screen corresponding to the movement of the mouse. By clicking a mouse button, the user confirms the selected information. In addition to the terminal ID  27  of the book marker  4 , the selected information is transmitted from the personal computer to the book mark search engine  10 . The transmission data is composed of the terminal ID  27  as a header and a pair of an entry of time information and a category flag thereof. 
     The book mark search engine  10  searches title information of musical piece that were broadcast from registered broadcasting stations corresponding to the time information and the terminal ID  27  that were transmitted. At this point, corresponding to the category flag transmitted along with the time information, title information is searched from radio stations or television stations. When title information is searched from television stations, musical pieces of music program, musical pieces of commercials, theme songs of dramas and musical pieces in dramas may be searched. 
     When the category flag represents out-of-area, title information is searched from musical pieces that were broadcast from broadcasting stations out of the registered area represented by user&#39;s zip code corresponding to the terminal ID  27 . 
     Search results obtained by the book mark search engine  10  are transmitted to the personal computer.  FIG. 23  shows an example of a search result display screen  210  displayed on the personal computer corresponding to transmitted search results. In this example, in  FIG. 22 , the user selects the entry ( 2 ) of time information that appears as the member  202 . The book mark search engine  10  searches musical piece information corresponding to the selected entry ( 2 ) of time information. As search results, musical piece information  211 ,  212 , and  213  appear on the search result display screen  210 . 
     In other words, the search results show that musical pieces represented by the musical piece information  211 ,  212 , and  213  were broadcast from broadcasting stations “AAAA”, “ABCD”, and “BBBB” at 12:00 am on Oct. 18, 1999 as the entry ( 2 ) of time information, respectively. Thus, it is supposed that the user listened to one of these musical pieces and operated the button  20  of the book marker  4  at the time represented by the entry ( 2 ) of the time information. 
     When the user operates the button  20  of the book marker  4 , it should be noted that he or she does not always operate the button  20  just when he listens to his or her favorite musical piece. In other words, there may be a situation of which after the user had listened his or her favorite musical piece, he operated the button  20 . Thus, it is preferable to consider a proper margin for a broadcast time in searching musical piece information. In this case, as represented with a member  217 , musical piece information for two musical pieces appears. 
     With reference to the musical piece information  211 ,  212 , and  213  on the search result display screen  210 , the user determines whether there is a musical piece he or she listened at the time represented by the entry ( 2 ) of the time information stored in the book marker  4  (at step S 43 ). When the user wants to listen to a demonstration of the selected musical piece, he or she operates a LISTEN button  214  that appears at each of the musical piece information  212 ,  213 , and  214  (at step S 45 ). When the user operates the LISTEN button  214 , a demonstration listening screen  220  that allows the use to listen to a demonstration of the selected musical piece appears.  FIG. 24  shows an example of the demonstration listening screen  220 . 
     When the user operates the LISTEN button  214 , the personal computer transmits information that represents what button  215  was pressed to the book mark search engine  10 . In this example, it is assumed that the LISTEN button  214  of the musical piece information  213  was operated. The book mark search engine  10  searches information of a music CD that contains a musical piece corresponding to the transmitted information from the database  1 . The searched information is transmitted to the personal computer. For example, additional information of the music CD such as musical piece names thereof appears as a list in a CD information display portion  221  on the demonstration listening screen  220 . 
     In the example shown in  FIG. 24 , an operating portion for controlling a reproducing operation of a musical piece appears on the right of the CD information display portion  221 . When the user operates a PLAY button  222 , he or she can listen to a demonstration of a musical piece corresponding to the LISTEN button  214 . When the user operates the PLAY button  222 , information that represents that the user pressed the PLAY button  222  is transmitted to the book mark search engine  10 . Music data is pre-stored in the database  1 . Music data corresponding to the selected musical piece information is transmitted from the book mark search engine  10  to the personal computer. 
     Music data may be transmitted from another web site connected to the book mark search engine  10  through a network. 
     The user listens to a demonstration of transmitted music data with the audio processing means  39  and the speaker  90  disposed in the personal computer (at step S 46 ). In  FIG. 24 , an operating portion  223  is a volume slider with which the audio volume of the reproduced sound can be adjusted. When the user listens to a demonstration of a musical piece, the reproduction length of the play time is limited. For example, only 15 seconds from the beginning or a principal portion of a musical piece are preferably reproduced. 
     In the flow chart shown in  FIG. 21 , it is determined whether or not a desired musical piece has been searched at step S 43 . Thereafter, the musical piece is demonstrated at step S 45 . Alternatively, after a musical piece is demonstrated, it may be determined whether or not a desired musical piece has been obtained. When desired musical piece information cannot be obtained as a search result at step S 43 , a search condition may be manually designated at step S 44 . Thus, desired musical piece information can be obtained. 
     The user wants to purchase a desired musical piece from the musical piece information  211 ,  212 , and  213  as the search results (at step S 47 ). This operation is performed as a result of the demonstration at step S 46  or directly from the musical piece information  211 ,  212 , and  213  that appear. The user purchases a musical piece with a music CD that contains the musical piece (as will be described later). Alternatively, the user may purchase a single musical piece rather than a music CD that contains it. 
     When the user does not want to purchase a searched musical piece at once, he or she can purchase it later (at step S 48 ). In this case, the search results can be stored in the web site of the book mark search engine  10  (at step S 49 ). When the user operates a SAVE button  215  of each of the musical piece information  211 ,  212 , and  213  on the demonstration listening screen  220  or a SAVE button  224  on the demonstration listening screen  220 , musical piece information as search results is stored along with user information such as terminal ID  27  to the database  2  of the book mark search engine  10 . 
     When the user operates the SAVE button  214  or the SAVE button  224 , a save screen  230  shown in  FIG. 25  appears. The save screen  230  contains a list of information  231  of musical pieces that were saved. On the save screen  230 , when the user operates a Listen button  233 , he or she can listen to a demonstration of the selected musical piece. When the user operates a Buy button  232 , he or she can order the selected musical piece. When the user operates a Delete button  234 , he or she can delete the information of the selected musical piece on the save screen  230 . 
     When the user operates a BUY button  216  on the search result display screen  210 , a BUY button  225  on the demonstration listening screen  220 , or the Buy button  232  on the save screen  230 , he or she can order the selected musical piece. The information of the ordered musical piece is correlated with the user information such as the terminal ID  27 . The resultant information is temporarily stored to a predetermined memory area of the book mark search engine  10  (at step S 50 ). This memory area is referred to as shopping cart. 
       FIG. 26  shows an example of a shopping cart screen  240  on which the contents of a shopping cart appear. On the shopping cart screen  240 , a list  241  of information of musical pieces Contained in the shopping cart and music CDs that contain the musical pieces appears. On the shopping cart screen  240 , the user can select a vender from which he or she will purchase the selected mucic CD (at step S 51 ). In this example, on the shopping cart screen  240 , a plurality of vendors appear. When the user operates one of buttons  242 A,  242 B, and  242 C, the personal computer is connected to a web site of the selected vendor at which he or she can purchase the selected music CD. 
     When the user operates a button  243 , an edit screen (not shown) appears. On the edit screen, the user can add or delete a vender of music CDs. 
     Next, the case that the user operated the button  242 C will be described. When the user operated the button  242 C, the personal computer is connected from the web site of the book mark search engine  10  to a “CD SHOP C” web site (at step S 52 ).  FIG. 27  shows a purchase screen  250  in the case that the personal computer is connected to the “CD SHOP C” web site. In this example, on the purchase screen  250 , an upper area and a lower area appear. The upper area is a screen  251  on which the web site of the book mark search engine  10  appears. The lower area is a screen  252  on which the “CD SHOP C” web site appears. 
     Data stored in the shopping cart of the book mark search engine  10  is directly transmitted as a purchase item list  253  to the “CD SHOP C” web site. The user decides whether or not the prices of the music CDs are proper corresponding to price information of the music CDs on the list  253  (at step S 53 ). When the prices are proper, the user orders the music CDs in the purchase item list  253 . When the user operates the BUY buttons  254 A,  254 B,  254 C, and  254 D, he or she can order and purchase the respective music CDs from the “CD SHOP C”. The fees of the music CDs can be charged to the credit card that is pre-registered to the “CD SHOP C”. 
     When the fees of the music CDs are not proper, the process is completed. Alternatively, as denoted by a dotted line in  FIG. 21 , the flow returns to step S 51 . At step S 51 , on the shopping cart screen  240 , the user can select another vendor. 
     When the user selected a kiosk terminal unit at step S 40 , he or she connects the book marker  4  to a predetermined connection terminal of the kiosk terminal unit through the connector  22  (at step S 55 ). The time information, the identification information, the category flag, and the terminal ID  27  are transmitted from the book marker  4  to the kiosk terminal unit. The kiosk terminal unit searches musical piece information corresponding to the transmitted information, displays search results to the user through a predetermined GUI (Graphical User Interface), and asks whether the user wants to listen to a demonstration of the selected music CD or purchase it. 
     When the desired musical piece and musical piece information have been found (at step S 56 ), the flow advances to step S 53 . At step S 53 , the user decides whether or not the fee of the music CD that contains the desired musical piece is proper. When the fee is proper, the user purchases the music CD. When the kiosk terminal unit is installed in a CD store, the user can purchase the desired music CD corresponding to the search result in the CD store. 
     Next, a second embodiment of the present invention will be described. According to the first embodiment of the present invention, the book mark search engine  10  searches only musical pieces that were broadcast from radio broadcasting stations and television broadcasting stations. In contrast, according to the second embodiment of the present invention, commodity items in commercials that were broadcast from television broadcasting stations are also searched. 
       FIG. 28  shows an example of the structure of a searching system according to the second embodiment of the present invention. In  FIG. 28 , similar portions to those in  FIG. 2  are denoted by similar reference numerals and their description is omitted. According to the second embodiment of the present invention, since commodity items commercials that were broadcast are searched, there is an advertizer  500 . The advertizer  500  may request for example an advertizing agent  502  to produce a commercial to be broadcast. The advertizing agent  502  may supply the created commercial to a broadcasting station  12 . 
     The advertiser  500  has a web site  501  on Internet. At the web site  501 , the advertiser  500  guides commodity items advertized in the commercial. In addition, the user can purchase the advertized commodity items from the web site  501 . The web site  501  can be accessed from the gateway device  11 . 
     In the book mark search engine  10 , the database  1  shown in  FIG. 2  corresponds to a broadcast contents database  1 ′. In addition, the database  2  corresponds to a customer database  2 ′. The broadcast contents database  1 ′ stores a play list that contains broadcast time of programs that are broadcast from the broadcasting station  12 . The play list may contain information about only commercials that are broadcast from the broadcasting station  12 . 
     The broadcast contents database  1 ′ also stores the URL of the web site  501  of the advertizer  500  and the name of the advertizer  500  in correlation with the play list. In addition, the broadcast contents database  1 ′ stores the names of the advertised commodity items in correlation with the broadcast time. In other words, when the broadcast contents database  1 ′ is searched with a key of a broadcast time, the name of the advertizer  500 , the URL of the web site  501  of the advertizer  500 , and the name of the commodity item advertised in the commercial that was broadcast at the broadcast time can be obtained as search results. 
     As with the first embodiment of the present invention, according to the second embodiment, the customer database  2 ′ stores the terminal ID  27  and the user data of each book marker  4 . In addition, the customer database  2 ′ can store information about user&#39;s favorites such as user&#39;s favorite radio stations and television stations registered corresponding to the terminal ID  27 . 
     According to the second embodiment of the present invention, an interface  503  is disposed in the book mark search engine  10 . The interface  503  allows predetermined information stored in the broadcast contents database  1 ′ to be easily updated from the outside. For example, the advertizer  500  can update information about commercials in the play list stored in the broadcast contents database  1 ′ through the interface  503 . Such information can be updated through the advertizing agent  502  on behalf of the advertizer  500 . The play list that represents contents that are broadcast by the broadcasting station  12  can be updated through the interface  503  by the broadcasting station  12 . 
     The interface  503  can be structured with a database management system having a predetermined filter that prohibits the broadcast contents database  1 ′ from being accessed from an authorized person. The interface  503  is preferably provided with a GUI that allows an external authorized client to easily update the contents of the broadcast contents database  1 ′. 
     In such a structure, when the user watched a commercial that he or she wants to know or in which he or she is interested, he or she operates the button  20  of the book marker  4  so as to store time information to the memory  26  of the book marker  4 . Thereafter, the user connects the book marker  4  to the gateway device  11  so as to transmit time information stored in the memory  26  from the book marker  4  to the gateway device  11  along with the terminal ID  27 . The time information and the terminal ID  27  are transmitted from the gateway device  11  to the book mark search engine  10 . 
     The book mark search engine  10  identifies the user using the transmitted terminal ID  27  and searches the broadcast contents database  1 ′ corresponding to the time information. The name of the advertiser  500 , the URL of the web site  501  of the advertizer  500 , the name of the commodity item of the commercial that was broadcast, and so forth are transmitted to the gateway device  11 . 
     The user can obtain necessary information about the commercial that was broadcast at the time represented by the time information stored in the book marker  4  corresponding to the name of the advertiser  500 , the URL of the web site  501  of the advertiser  500 , and information such as the name of the commodity item that was broadcast in the commercial. In addition, since the user can know the URL of the web site  501  of the advertizer  500 , he or she can access the web site  501  using the gateway device  11 . Thus, the user can obtain detailed information about the commodity item and information of other commodity items with which the advertizer  500  deal. 
     When the web site  501  allows the user to purchase commodity items, he or she can order a desired commodity item to the advertizer  500  using the gateway device  11 . 
     When the customer database  2 ′ stores information about the user&#39;s favorites, the advertiser  500  can know favorites of the user who accessed the web site  501  by searching the customer database  2 ′. Thus, the advertizer  500  can provide the user with relevant information. 
     According to the first embodiment of the present invention, when the user presses the button  20  twice in a predetermined time period, the category flag represents a television broadcast. Thus, the book mark search engine  10  can determine that time information stored is for a television broadcast. In other words, the searching system according to the second embodiment and the musical piece data searching system can be accomplished at a time. 
     For example, when a first operating portion that stores time information for a radio broadcast and a second operating portion that stores time information for a television broadcast are disposed, a category flag for a musical piece and a category flag for a commercial are generated. The book mark search engine  10  can determine whether the user wants to know information of a musical piece in a commercial or information of a commodity item advertized in a commercial corresponding to stored time information. 
     According to the second embodiment of the present invention, there may be money flows among the advertizer  500 , the broadcasting station  12 , the book mark search engine  10 , and the user.  FIG. 29  shows money flows that may take place according to the second embodiment. 
     First of all, an advertisement broadcasting fee M 1  takes place between the broadcasting station  12  and the advertiser  500 . The advertisement broadcasting fee M 1  moves from the advertizer  500  to the broadcasting station  12 . When the user accesses the web site  501  of the advertizer  500  corresponding to information obtained by the book mark search engine  10  and purchases a commodity item therefrom, a service fee M 2  of the book mark search engine  10  takes place. The service fee M 2  moves from the advertiser  500  to the book mark search engine  10 . Corresponding to information obtained from the book mark search engine  10 , when the user just accesses the web site  501 , the service fee M 2  may take place. In addition, when the user accesses the web site  501  with information obtained from the book mark search engine  10  and purchases a commodity item from the advertiser  500 , the user pays a fee M 3  for the commodity item to the advertiser  500 . 
     As was described above, according to the present invention, when a button disposed on a book marker is pressed, information representing time at which the button was pressed is stored to the book marker. When the information representing time is transmitted to a book mark search engine, information of contents that were being broadcast at the time of which the button was pressed is obtained from the book mark search engine. The book mark search engine has a first database that stores play lists that correlatively contain contents of broadcasting stations and broadcast time thereof and a second database that correlatively stores the contents and additional information thereof. 
     According to a first embodiment of the present invention, when information representing time stored in the book marker is transmitted to the gateway device, the transmission of the information is graphically displayed using a GUI. Thus, the user can visually know that information stored in the book mark is being transmitted to the gateway device. In addition, the user can visually enjoy the transmission state of the information. 
     According to the first embodiment of the present invention, the user can listen to a demonstration of a musical piece that he or she selected from search results searched by the book mark search engine representing time stored in the book marker using the gateway device. Thus, the user can directly know contents that were being broadcast when he or she stored information to the book marker. 
     In addition, according to the present invention, when the user performs a predetermined operation for the gateway device corresponding to search results that the book mark search engine searched using information representing time stored in the book marker, the user can access a site at which he or she can purchase the contents. Thus, the user can purchase his or her favorite commodity item even if he or she knows only fragmental information thereof. 
     In addition, according to the present invention, as search results that the book mark search engine searched using information representing time stored in the book marker, contents that were being broadcast at the time stored in the book marker and contents that were being broadcast earlier than those are obtained. Thus, the operation of the book marker can be performed with a proper margin. 
     In addition, according to the present invention, since the book mark search engine is provided with an interface that allows information stored in a database to be changed from the outside, the contents of the database can be easily changed by an advertizer, an advertising agent, and a broadcasting station. Thus, the contents can be flexibly changed. 
     In addition, according to the present invention, since the main body of the book marker is provided with a dedicated connector that allows data to be exchanged with the outside, information stored in the book marker can be transmitted without need to use an extra cable. Thus, even if a gateway device installed in a retail store or a public facility is used, it is not necessary for the user to carry a connection cable. 
     In addition, according to the present invention, when one button disposed in the book marker is operated in different manners, a plurality of types of identification information are generated. Thus, the book marker can categorically store information representing time at which a musical piece was being broadcast from a radio broadcasting station, information representing time at which a musical piece was being broadcast from a television broadcasting station, and information representing time at which commodity information was being broadcast from a television broadcasting station. 
     According to the embodiments of the present invention, since the book marker is formed in a pendant shape, a wrist band shape, a key holder shape, or the like, the user can easily carry it. In addition, the book marker has an appearance suitable for a portable device. 
     Although the present invention has been shown and described with respect to a best mode embodiment thereof, it should be understood by those skilled in the art that the foregoing and various other changes, omissions, and additions in the form and detail thereof may be made therein without departing from the spirit and scope of the present invention.