# Patent

## Title
User definable on-line co-user lists

## Abstract

A real time notification system that tracks, for each user, the logon status of selected co-users of an on-line or network system and displays that information in real time to the tracking user in a unique graphical interface. The invention provides user definable on-line co-user lists, or “buddy lists”, that track specific co-users in real-time automatically. A user can create many separate buddy lists of co-users, either with intersecting or disjoint lists of users, and label these buddy lists according to the user's preference. The user can update a buddy list or create new buddy lists whenever necessary. When a user logs on to a system, the user's set of buddy lists is presented to the buddy list system. The buddy list system attempts to match co-users currently logged into the system with the entries on the user's buddy list. Any matches are displayed to the user. As co-users logon and logoff, a user's buddy list is updated to reflect these changes. An indication can also be added to show that a co-user just logged on or just left the system.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation application of U.S. application Ser. No. 09/835,378, filed Apr. 17, 2001, now U.S. Pat. No. 6,677,968 and titled “User-Definable On-Line Co-User Lists,” which is a continuation application of U.S. application Ser. No. 08/803,692, filed Feb. 24, 1997, now U.S. Pat. No. 6,750,881 and titled “User-Definable On-Line Co-User Lists,” both of which are incorporated by reference.


BACKGROUND
1. Field of the Invention
This invention relates to on-line communication networks, and particularly to interpersonal communications on such networks.
2. Description of Related Art
An important aspect of an “online” system, such as the proprietary system operated by America Online, Inc. (AOL) or the public Internet system, is knowledge of the people/users/processes on that system and a methodology for communicating with them through some selected protocol. When a person “logs on” to a network system, they are in effect identifying themselves to the system and announcing their presence. On most systems, this presence is unique to every user who is on the system. For example, on the AOL network this presence is known as the “screen name”, but on other systems it could be an Internet Protocol (IP) address or some other unique identifier.
An Internet Service Provider (ISP) is, in a sense, an online system because every user has an associated IP network address and may also have a user id and password. There can also be a hierarchy of logon systems, where an ISP is used to connect to a first network, and then once connected the user can log on to another system with a different identity. These secondary systems can be in parallel (i.e., a user connects to an ISP and then logs on to multiple systems), or a combination of parallel and hierarchical (i.e., a user logs on to multiple systems in parallel once connected to the ISP, and then from one of those parallel systems logs on to yet other systems. Thousands to millions of users may be accessing such complex networks at any point in time.
A problem with networks on any size is tracking personal relationships and maintaining knowledge of the people/users/processes on that system. In the AOL network, a user could use a LOCATE function to inquire from the system if another user was currently logged into the system. In the CompuServe network, a user can use a more limited “WHO'S HERE” function to determine who is present in a forum conference.
The present invention addresses the problem of tracking personal relationships and maintaining knowledge of the people/users/processes on that system with a unique way of establishing and maintaining user definable on-line co-user lists.
SUMMARY
The invention implements a real time notification system that tracks, for each user, the logon status of selected co-users of an on-line or network system and displays that information in real time to the tracking user in a unique graphical interface. The invention provides user definable on-line co-user lists, or “buddy lists”, that track specific co-users in real-time automatically.
A user can create many separate buddy lists of co-users, either with intersecting or disjoint lists of users, and label these buddy lists according to the user's preference. The user can update a buddy list or create new buddy lists whenever necessary. When a user logs on to a system, the user's set of buddy lists is presented to the buddy list system. The buddy list system attempts to match co-users currently logged into the system with the entries on the user's buddy list. Any matches are displayed to the user. As co-users logon and logoff, a user's buddy list is updated to reflect these changes. An indication can also be added to show that a co-user just logged on or just left the system.
The details of the preferred embodiment of the present invention are set forth in the accompanying drawings and the description below. Once the details of the invention are known, numerous additional innovations and changes will become obvious to one skilled in the art.



DESCRIPTION OF DRAWINGS
FIG. 1 is a block diagram of a typical network system 10 in which the invention can be implemented.
FIG. 2a is a set of symbolic data records showing the basic types of data used by one embodiment of the invention for a buddy list, and the conceptual relationship of data elements.
FIG. 2b is a set of symbolic data records showing the basic types of data used by one embodiment of the invention for a permissions list, and the conceptual relationship of data elements.
FIG. 3 is a graphical display of one implementation of the invention, showing a buddy list window.
FIG. 4 is a graphical display of one implementation of the invention, showing a buddy list setup window.
FIG. 5 is a graphical display of one implementation of the invention, showing a buddy list create window.
FIG. 6 is a graphical display of one implementation of the invention, showing a buddy list preferences window.
FIG. 7 is a graphical display of one implementation of the invention, showing a search member directory window.
FIG. 8 is a graphical display of one implementation of the invention, showing a member location window.
FIG. 9 is a graphical display of one implementation of the invention, showing an instant message window.
FIG. 10 is a graphical display of one implementation of the invention, showing a buddy chat window.
FIG. 11 is a flowchart showing an implementation of the invention.



Like reference numbers and designations in the various drawings indicate like elements.
DETAILED DESCRIPTION
Throughout this description, the preferred embodiment and examples shown should be considered as exemplars, rather than as limitations on the present invention.
Overview
The invention implements a real time notification system that tracks, for each user, the logon status of selected co-users and displays that information in real time to the tracking user in a unique graphical interface. The invention provides user definable on-line co-user lists, or “buddy lists”, that track specific co-users in real-time automatically. Such automatic monitoring is significant, because in a system of any size there would be no way for a user to track the comings and goings of thousands or millions of users each moment in time.
An important component of the buddy list system is that a user can create many separate buddy lists of co-users, either with intersecting or disjoint lists of co-users, and label these buddy lists according to the user's preference. The user can update a buddy list or create new buddy lists whenever necessary. When a user logs on to a system, the user's set of buddy lists is presented to the buddy list system. The buddy list system attempts to match co-users currently logged into the system with the entries on the user's buddy list. Any matches are displayed to the user. As co-users logon and logoff, a user's buddy list is updated in real-time (or near real-time, taking into account network and processing delays) to reflect these changes. An indication can also be added to show that a co-user just logged on or just left the system.
Hardware System
By way of example only, FIG. 1 is a block diagram of a typical network system 10 in which the invention can be implemented. The network system 10 includes a plurality of user stations 12 that preferably include a processor chassis 14 having a network link. The network link is for receiving and transmitting data in analog or digital form over a communications link 16, such as a serial link, local area network, wireless link, parallel link, etc. Also coupled to a typical processor chassis 14 is a display 18, a keyboard 20, and a pointing device 22 (e.g., a mouse).
The communications link 16 couples each user station 12 as a “client” to a logon system 24, which is typically a software program executing on a remote server somewhere on a network. The logon system 24 communicates with a “Buddy List System” 26, which is preferably a software program executing on a server somewhere on the network. The Buddy List System 26 maintains a database 28 for storing user information. The database 28 may be of any type, such as relational or hierarchical, and may be centralized or distributed. For example, the database 28 may be stored at least in part on each user's own station 12. In such a case, the database 28 contents would be transmitted to the Buddy List System 26 when the user logged into the system.
Data Structure
FIG. 2a is a set of symbolic data records showing the basic types of data used by the Buddy List System 26, and the conceptual relationship of data elements. A Group Name table 30 stores user-defined group names for buddy lists. Each user may define multiple buddy lists by group names (two being shown by way of example). Each group name in the Group Name table 30 has an associated Buddy List table 32, comprising multiple records. Each Buddy List table 32 record corresponds to a co-user (“buddy”) that the user wishes to track. In the preferred embodiment, the record includes data elements for the screen name (or address, such as an Internet address) of a particular co-user to be tracked, and the logon status of that user (e.g., codes for “In” or “Out”).
FIG. 2b is a set of symbolic data records showing the basic types of data used by one embodiment of the invention for a Permissions List 34, and the conceptual relationship of data elements. Each user in the system has an associated Block Status code. If a user's Block Status code is equivalent to “none”, then no co-user may enter that user into the co-user's buddy lists. If a user's Block Status code is equivalent to “all”, then all co-users may enter that user into their buddy lists. If a user's Block Status code is equivalent to “all except”, then all co-users except those entered in a linked Exclusion List 36 may enter that user into their buddy lists. If a user's Block Status code is equivalent to “none except”, then only co-users entered in a linked Inclusion List 38 may enter that user into the co-user's buddy lists. In one embodiment, a user may only have one of an Inclusion List 36 and an Exclusion List 48.
Example Implementation
FIG. 3 is a graphical display of one implementation of the invention, showing a Buddy List window 40 with a buddy list named “Home List” in a large scrollable area. Buddy list names are like categories. Other buddy lists can be shown in the same display. Indented underneath each buddy list are the names (or addresses) of user-selected co-users comprising that list. In the example shown, the “Home List” includes three co-users and their status as “IN” (i.e., currently logged into the system) or “OUT” (i.e., currently logged out of the system). Any desired method or technique can be used to indicate log status, such as distinct attributes (e.g., bolding a name to indicate logged in, graying a name to indicated logged out) or other symbols (e.g., checkmarks to indicate logged in), etc. In still another embodiment, only logged in members of a buddy list are displayed. In one embodiment, an asterisk or other symbol appears next to the screen name of the most recent co-user to log into the system, and parentheses are placed around the screen name of the most recent co-user to log out of the system.
In the preferred embodiment, a user can “minimize” a buddy list to suppress display of all the co-users in that group. This is preferably implemented so that a double click on the buddy list name will cause all the screen names listed beneath to disappear. In the preferred embodiment, minimized buddy lists are indicated by a “+” symbol next to the buddy list name. Double-clicking on the buddy list name again displays all of the hidden co-users under that name. A user can also keep tabs on each list by checking out the numbers posted in parenthesis next to the buddy list names. This number tells the user how many people on that list are logged in out of the total number of screen names on the buddy list. In the illustrated example, 2/3 means that two of the three people on the “Home List” are currently online. In the preferred embodiment, when the user first logs into the system, the Buddy List window 40 opens, informing the user which of the user's buddy list members are currently online. The user can either close this window, or leave it open while visiting other areas of the system. If the Buddy List window 40 is left open, the user has a current, real-time list of all the user's buddies in who are online at any particular moment.
The illustrated Buddy List window 40 shows a number of buttons for setting up or using buddy lists. Included buttons in the preferred embodiment are: LOCATE, for determining which “chat room” a buddy is in at a particular moment; IM, for sending an “Instant Message”; SETUP, for creating and editing buddy lists or setting buddy list preferences; and BUDDY CHAT, for inviting buddies to a private chat or a favorite place in the system.
Setup
FIG. 4 is a graphical display of one implementation of the invention, showing a Buddy List Setup window 50 with a buddy list named “Home List” in a scrollable area. Buttons are provided for creating a new buddy list; editing a selected buddy list; deleting a buddy list; viewing the members of a selected buddy list; accessing a Member Directory for the system; and accessing a preferences windows. In the preferred embodiment, each buddy list is shown in the scrollable area with a count of the number of co-users in each list.
FIG. 5 is a graphical display of one implementation of the invention, showing a Buddy List Create window 60. A user can enter a buddy list group name and a screen name for each co-user to be tracked. A list of buddies on a particular list are also displayed, along with a button allowing removal of an existing buddy. After entry of all necessary data in such a window, the user's Group Name table 30 and the appropriate Buddy List table 32 are updated using conventional data processing techniques. Editing a buddy list can be done from the same or a similar window.
FIG. 6 is a graphical display of one implementation of the invention, showing a Buddy List Preferences window 70. In the preferred embodiment, these Preferences include the following:

    
    
        Show me my Buddy List(s) immediately after I sign onto AOL. This option opens the Buddy List window 40 (FIG. 3) when the user logs on to the system.
        Play sound when buddies sign-on. This option enables a sound to play when one of the co-users on a user's buddy list program logs on (“BuddyIn”).
        Play sound when buddies sign-off This option enables a sound to play when one of the co-users on a user's buddy list program logs off (“BuddyOut”).
        Allow all members to add me to their lists/invitations. This option grants permission for all co-users to add the user to their buddy lists and send the user “Buddy Chat Invitations” and other information. If set, the appropriate user record in the Permissions List table 34 is marked with a code for “all” in the Block Status field.
        Block all members from adding me to their lists/invitations. This option restricts all co-users from adding the user to their buddy lists and from sending the user “Buddy Chat Invitations” and other information. If set, the appropriate user record in the Permissions List table 34 is marked with a code for “none” in the Block Status field.
        Allow only the members below. This option restricts all members from adding the user to their buddy lists and from sending the user “Buddy Chat Invitations” and other information, except for those co-users specifically listed where provided in the window. If set, the appropriate user record in the Permissions List table 34 is marked with a code for “none except” in the Block Status field, and an Inclusion List 38 is linked to the user for storing the names of included co-users.
        Block only the members below. This option grants permission for all other members to add the user to their buddy lists and send the user “Buddy Chat Invitations” and other information, except for those co-users specifically listed where provided in the window. If set, the appropriate user record in the Permissions List table 34 is marked with a code for “all except” in the Block Status field, and an Exclusion List 36 is linked to the user for storing the names of excluded co-users.
        Sound Library. Allows a user to select sound events for “BuddyIn” and “BuddyOut”.
    
    


In the preferred embodiment, the Inclusion List 38 and the Exclusion List 36 options are mutually exclusive. In this way, a user can control who sees the user logging on and off the system. Although the user can be placed on the buddy list of a co-user, if the user blocks visibility through the use of these controls, the co-user does not see the logon/logoff status of that user.
FIG. 7 is a graphical display of one implementation of the invention, showing a Search Member Directory window 80. In the preferred embodiment, this feature is accessed from the Buddy List Setup window 50 (FIG. 4), and allows searching a system directory in known fashion for screen names or addresses of co-users, for entry into buddy lists.
Locate
FIG. 8 is a graphical display of one implementation of the invention, showing a member location window 90. In the preferred embodiment, this feature is accessed from the Buddy List window 40 (FIG. 3). Selecting a co-user's name from a buddy list and activating the LOCATE button will cause the system to determine whether the selected co-user is in a chat area or not. If no co-user is selected and the LOCATE button is activated, a member location window 90 is displayed with the input field blank, for entry of a co-user name. This feature using the existing locate functions of the system.
Instant Messages
Once a co-user is displayed on a user's buddy list, indicating that the co-user is currently logged into the network system, the preferred embodiment of the invention enables a simple way of communicating with that co-user. FIG. 9 is a graphical display of one implementation of the invention, showing an Instant Message window 100. In the preferred embodiment, the Instant Message window is automatically displayed by activating (e.g., by clicking or double clicking) a co-user's name on a buddy list. The “To:” line of the window is pre-filled with the selected co-user's name and the cursor is positioned in the text entry area ready for text to be typed to be sent to the targeted co-user. The Instant Message function can also be activated by highlighting a co-user name in the buddy list and clicking on the IM button in the Buddy List window 40 (FIG. 3).
Buddy Chat
FIG. 10 is a graphical display of one implementation of the invention, showing a Buddy Chat window 110. As implemented on the AOL on-line system, the Buddy Chat function can be used to send an invitation to one or more co-users to a private “chat room” or a favorite place in the system. In the preferred embodiment, this function can be initiated by selecting a co-user name and activating the BUDDY CHAT button in the Buddy List window 40 (FIG. 3). The Buddy Chat window 110 is displayed, allowing the user to add additional names to the Screen Names to Invite field either manually or by selecting additional names from the Buddy List window 40 and again activating the BUDDY CHAT button. A message can be sent to each invitee via the Message to Send field. In the preferred embodiment, an entire buddy list group can be added to the Buddy Chat window 110 by selecting a group name from the Buddy List window 40 and activating the BUDDY CHAT button or double-clicking.
To talk privately with the selected co-users, the user selects the Private Chat Room radio button and enters a “Buddy Chat Room Name” in the provided edit box. If the edit box is left blank, a Buddy Chat Room Name is automatically created for the user. Upon selecting Send, each selected co-user will receive a message inviting them to access and display a Buddy Chat Room (chat rooms are an existing feature of the AOL system).
To share those places a user likes best on the AOL system, the user selects the Keyword/Favorite Place radio button and enters a “Keyword” (i.e., a shortcut word defining an address) to a system site in the provided edit box, either manually or by using a “drag and drop” action from a list of the user's favorite places in the system. Upon selecting Send, each selected co-user will receive a message inviting them to access and display that online site.
FIG. 11 is a flowchart showing an implementation of the invention. A User logs in to a Logon System in conventional fashion (Step 200). The Logon System performs normal logon procedures (e.g., requesting a user ID and/or a password) and notifies the Buddy List System about the User (i.e., passes the User's ID, address, or screen name to the Buddy List System) (Step 202). The Buddy List System accesses that User's Buddy Lists from a database, which may be, for example, on the user's station 12 (Step 204). The entries in the User's Buddy Lists are then compared to the records of the Logon System (Step 206). This step is shown in dotted outline to indicate that the comparison can be done by passing records from the Logon System to the Buddy List System, or vice versa, or could be done a separate system. The Buddy List System then displays a Buddy List window showing the status (i.e., logged in or not) of the co-users on the User's Buddy Lists with any of various indicator markings (Step 208).
Thereafter, while the User's Buddy List window is open, the Logon System notifies the Buddy List System about new logons/logoffs of co-users (Step 210), causing a new compare of the User's Buddy List entries to the Logon System records (Step 206). Again, the compare may be performed anywhere. For example, the Logon System may maintain a copy of a User's Buddy Lists, and notify the Buddy List System only upon a logon status change for a co-user on the User's Buddy Lists. The Buddy List System then updates the indicated status of the displayed co-users (Step 208).
Software Implementation
The invention may be implemented in hardware or software, or a combination of both. However, preferably, the invention is implemented in computer programs executing on programmable computers each comprising at least one processor, at least one data storage system (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device. Program code is applied to input data to perform the functions described herein and generate output information. The output information is applied to one or more output devices, in known fashion.
Each program is preferably implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the programs can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language.
Each such computer program is preferably stored on a storage media or device (e.g., ROM or magnetic diskette) readable by a general or special purpose programmable computer, for configuring and operating the computer when the storage media or device is read by the computer to perform the procedures described herein. The inventive system may also be considered to be implemented as a computer-readable storage medium, configured with a computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner to perform the functions described herein.
A number of embodiments of the present invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. For example, while the preferred embodiment is event driven, meaning that updates to a buddy list are based on a change in the logon status of all co-users or of the selected co-users on a user's buddy list, updates can instead be performed on a periodic basis, where the buddy list system polls the logon system for logon status changes, or vice versa. Accordingly, it is to be understood that the invention is not to be limited by the specific illustrated embodiment, but only by the scope of the appended claims.

## Claims

1. An electronic network system that enables a user of the electronic network system to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists in substantially real-time, comprising:
a communications network;
a user device that is structured and arranged to communicate using the communications network and that receives the current logon status of the co-users in the co-user lists in substantially real-time, the user device including a graphical user interface having one or more window interfaces structured and arranged to enable:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list, and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user; and

a logon system, remote from the user device, that monitors the logon status of the co-users and that uses the communications network to make the logon status of the co-users accessible to the user device.

2. The system of claim 1 wherein the graphical user interface is structured and arranged to enable selection of sounds by the user that are related to current logon status.

3. The system of claim 2 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

4. The system of claim 2 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

5. The system of claim 2 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

6. The system of claim 2 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

7. The system of claim 2 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

8. The system of claim 2 wherein the graphical user interface is structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

9. The system of claim 2 wherein the graphical user interface is structured and arranged to enable a visual indication of a most recent co-user to log on.

10. The system of claim 2 wherein the graphical user interface is structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

11. The system of claim 2 wherein the graphical user interface is structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

12. The system of claim 2 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

13. The system of claim 2 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

14. The system of claim 2 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

15. The system of claim 14 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

16. The system of claim 2 wherein the graphical user interface is structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

17. The system of claim 1 wherein the graphical user interface is structured and arranged to enable designation by the user of one or more selected co-users to be prevented from receiving a current logon status of the user.

18. The system of claim 17 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

19. The system of claim 17 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

20. The system of claim 17 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

21. The system of claim 17 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

22. The system of claim 17 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

23. The system of claim 17 wherein the graphical user interface is structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

24. The system of claim 17 wherein the graphical user interface is structured and arranged to enable a visual indication of a most recent co-user to log on.

25. The system of claim 17 wherein the graphical user interface is structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

26. The system of claim 17 wherein the graphical user interface is structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

27. The system of claim 17 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

28. The system of claim 17 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

29. The system of claim 17 wherein the graphical user interface is structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

30. The system of claim 17 wherein the graphical user interface is structured and arranged to enable selection of sounds by the user that are related to current logon status.

31. The system of claim 30 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

32. The system of claim 31 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

33. A method that enables a user of an electronic network system to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists in substantially real-time, the method comprising:
receiving, at a user device, the current logon status of the co-users in the co-user lists in substantially real-time;
using a graphical user interface having one or more window interfaces to enable:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list, and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user; and

monitoring the logon status of the co-users at a logon system that is remote from the user device and making the logon status of the co-users accessible to the user device.

34. The method as in claim 33 wherein the graphical user interface is further used to enable selection of sounds by the user that are related to current logon status.

35. The method as in claim 34 wherein the graphical user interface is further used to enable a display of only currently logged on co-users in the co-user lists.

36. The method as in claim 34 wherein the graphical user interface is further used to enable a display of the co-user lists that visually distinguishes currently logged on co-users from other co-users.

37. The method as in claim 34 wherein the graphical user interface is further used to enable receipt of updates and to enable the display of the co-user lists to reflect changes in the logon status of the co-users in the co-user lists.

38. The method as in claim 34 wherein the graphical user interface is further used to enable a display of a visual indication to reflect a newly logged-on co-user.

39. The method as in claim 34 wherein the graphical user interface is further used to enable a display of a visual indication to reflect a newly logged-off co-user.

40. The method as in claim 34 wherein the graphical user interface is further used to enable a display of a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

41. The method as in claim 34 wherein the graphical user interface is further used to enable a display of a visual indication of a most recent co-user to log-on.

42. The method as in claim 34 wherein the graphical user interface is further used to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

43. The method as in claim 34 wherein the graphical user interface is further used to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

44. The method as in claim 34 wherein the graphical user interface is further used to enable the display of the co-user lists to include the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

45. The method as in claim 34 wherein the graphical user interface is further used to enable the display of the co-user lists to incorporate the current logon status of the co-users as a part of the co-user lists.

46. The method as in claim 34 wherein the graphical user interface is further used to enable selection by the user of a first sound to indicate a logon of a co-user.

47. The method as in claim 46 wherein the graphical user interface is further used, to enable selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

48. The method as in claim 34 wherein the graphical user interface is further used to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

49. The method as in claim 33 wherein the graphical user interface is further used to enable designation by the user of one or more selected co-users to be prevented from receiving a current logon status of the user.

50. The method as in claim 49 wherein the graphical user interface is further used to enable a display of only currently logged on co-users in the co-user lists.

51. The method as in claim 49 wherein the graphical user interface is further used to enable a display of the co-user lists that visually distinguishes currently logged on co-users from other co-users.

52. The method as in claim 49 wherein the graphical user interface is further used to enable receipt of updates and to enable the display of the co-user lists to reflect changes in the logon status of the co-users in the co-user lists.

53. The method as in claim 49 wherein the graphical user interface is further used to enable a display of a visual indication to reflect a newly logged-on co-user.

54. The method as in claim 49 wherein the graphical user interface is further used to enable a display of a visual indication to reflect a newly logged-off co-user.

55. The method as in claim 49 wherein the graphical user interface is further used to enable a display of a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

56. The method as in claim 49 wherein the graphical user interface is further used to enable a display of a visual indication of a most recent co-user to log-on.

57. The method as in claim 49 wherein the graphical user interface is further used to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

58. The method as in claim 49 wherein the graphical user interface is further used to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

59. The method as in claim 49 wherein the graphical user interface is further used to enable the display of the co-user lists to include the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

60. The method as in claim 49 wherein the graphical user interface is further used to enable the display of the co-user lists to incorporate the current logon status of the co-users as a part of the co-user lists.

61. The method as in claim 49 wherein the graphical user interface is further used to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

62. The method as in claim 49 wherein the graphical user interface is further used to enable selection of sounds by the user that are related to current logon status.

63. The method as in claim 62 wherein the graphical user interface is further used to enable selection by the user of a first sound to indicate a logon of a co-user.

64. The method as in claim 63 wherein the graphical user interface is further used to enable selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

65. A system that enables a user of an electronic network system to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists in substantially real-time, comprising:
means for receiving, at a user device, the current logon status of the co-users in the co-user lists in substantially real-time;
means for using a graphical user interface having one or more window interfaces to enable:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list, and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user; and

means for monitoring the logon status of the co-users at a logon system that is remote from the user device and for making the logon status of the co-users accessible to the user device.

66. A graphical user interface that enables a user of an electronic network system to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists substantially in real-time, comprising:
one or more window interfaces that are structured and arranged to enable:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list; and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user.

67. The graphical user interface of claim 66 wherein the one or more window interfaces are structured and arranged to enable selection of sounds by the user that are related to current logon status.

68. The graphical user interface of claim 67 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

69. The graphical user interface of claim 67 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

70. The graphical user interface of claim 67 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

71. The graphical user interface of claim 67 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

72. The graphical user interface of claim 67 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

73. The graphical user interface of claim 67 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

74. The graphical user interface of claim 67 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a most recent co-user to log on.

75. The graphical user interface of claim 67 wherein the one or more window interfaces are structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

76. The graphical user interface of claim 67 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

77. The graphical user interface of claim 67 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

78. The graphical user interface of claim 67 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

79. The graphical user interface of claim 67 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

80. The graphical user interface of claim 79 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

81. The graphical user interface of claim 67 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

82. The graphical user interface of claim 66 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from receiving a current logon status of the user.

83. The graphical user interface of claim 82 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

84. The graphical user interface of claim 82 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

85. The graphical user interface of claim 82 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

86. The graphical user interface of claim 82 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

87. The graphical user interface of claim 82 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

88. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

89. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a most recent co-user to log on.

90. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

91. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

92. The graphical user interface of claim 82 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

93. The graphical user interface of claim 82 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

94. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

95. The graphical user interface of claim 82 wherein the one or more window interfaces are structured and arranged to enable selection of sounds by the user that are related to current logon status.

96. The graphical user interface of claim 95 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

97. The graphical user interface of claim 96 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

98. A computer program product embodied in a tangible computer-readable medium, the computer program product comprising instructions for enabling a user device to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists substantially in real-time and to enable the following operations in a graphical user interface having one or more window interfaces:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list; and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user.

99. The computer program product of claim 98 wherein the one or more window interfaces are structured and arranged to enable selection of sounds by the user that are related to current logon status.

100. The computer program product of claim 99 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

101. The computer program product of claim 99 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

102. The computer program product of claim 99 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

103. The computer program product of claim 99 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

104. The computer program product of claim 99 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

105. The computer program product of claim 99 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

106. The computer program product of claim 99 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a most recent co-user to log on.

107. The computer program product of claim 99 wherein the one or more window interfaces are structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

108. The computer program product of claim 99 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

109. The computer program product of claim 99 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

110. The computer program product of claim 99 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

111. The computer program product of claim 99 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

112. The computer program product of claim 111 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

113. The computer program product of claim 99 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

114. The computer program product of claim 98 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from receiving a current logon status of the user.

115. The computer program product of claim 114 wherein the display of the co-user lists is structured and arranged to display only currently logged on co-users.

116. The computer program product of claim 114 wherein the display of the co-user lists is structured and arranged to visually distinguish currently logged on co-users from other co-users.

117. The computer program product of claim 114 wherein the display of the co-user lists is structured and arranged to receive updates and to reflect changes in the logon status of the co-users in the co-user lists.

118. The computer program product of claim 114 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-on co-user.

119. The computer program product of claim 114 wherein the display of the co-user lists includes a visual indication to reflect a newly logged-off co-user.

120. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a number of currently logged on co-users out of a total number of co-users defined for a particular co-user list.

121. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable a visual indication of a most recent co-user to log on.

122. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable designation by the user of all co-users to be prevented from adding the user to co-user lists maintained by all the co-users.

123. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more co-users, wherein only the designated co-users are able to add the user to co-user lists maintained by the designated co-users.

124. The computer program product of claim 114 wherein the display of the co-user lists includes the current logon status of the co-users in the co-user lists as an integrated part of the co-user lists.

125. The computer program product of claim 114 wherein the display of the co-user lists incorporates the current logon status of the co-users as a part of the co-user lists.

126. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable designation by the user of one or more selected co-users to be prevented from adding the user to a co-user list maintained by the selected co-user.

127. The computer program product of claim 114 wherein the one or more window interfaces are structured and arranged to enable selection of sounds by the user that are related to current logon status.

128. The computer program product of claim 127 wherein the user selectable sounds include selection by the user of a first sound to indicate a logon of a co-user.

129. The computer program product of claim 128 wherein the user selectable sounds include selection by the user of a second sound that is different from the first sound to indicate a logoff of a co-user.

130. A system that enables a user of an electronic network system to define and to perceive one or more user-created co-user lists and to track a current logon status of co-users in the co-user lists substantially in real-time, comprising:
means for using a graphical user interface having one or more window interfaces to enable:
designation by the user of one or more co-users including at least one of creating, labeling, and defining the co-user lists using the graphical user interface, wherein the co-user lists include one or more intersecting or disjoint lists of co-users,
modification by the user of the co-user lists including addition or removal of co-users from the co-user lists using the graphical user interface,
a display of the co-user lists that includes a visual indication of the current logon status of the co-users in the co-user lists, wherein at least one particular co-user list can be minimized independent of other co-user lists and the one or more windows of the graphical user interface to prevent a display of the co-users in the particular co-user list; and
selection by the user of a co-user from one of the displayed co-user lists as an intended recipient of an instant message from the user.

131. A method for enabling a user to control perception, by co-users, of an indication of the user's presence on an electronic network system, the method comprising:
presenting a graphical user interface to a user of an electronic network system, wherein the graphical user interface includes a user-definable co-user list that enables perception of indications of co-users' presence on the electronic network system; and
enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists.

132. The method as in claim 131 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes enabling the user to control the perception, by co-users, of the indication of the user's presence by selectively blocking co-users from adding the user to their associated user-definable co-user lists.

133. The method as in claim 131 further comprising tracking the presence of the user and the co-users on the electronic network system.

134. The method as in claim 131 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes enabling the graphical user interface to receive preferences from the user to block the co-users from adding the user to their associated user-definable lists.

135. The method as in claim 131 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes:
receiving preferences from the user; and
creating an inclusion list based on the preferences received from the user.

136. The method as in clam 131 wherein the inclusion list contains a list of co-users expressly permitted by the user to perceive the indication of the user's presence on the electronic network system.

137. The method as in claim 136 wherein only the co-users contained in the inclusion list are permitted to perceive the indication of the user's presence on the electronic network system.

138. The method as in claim 131 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes:
receiving preferences from the user; and
creating an exclusion list based on the preferences received from the user.

139. The method as in claim 138 wherein the exclusion list contains a list of co-users not permitted by the user to perceive the indication of the user's presence on the electronic network system.

140. The method of claim 131 wherein enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists comprises enabling the user to block the co-users from using the electronic network system to communicate with the user.

141. A graphical user interface for enabling a user to control perception, by co-users, of an indication of the user's presence on an electronic network system, comprising:
a user-definable co-user list that enables perception of indications of co-users' presence on an electronic network system; and
a preferences interface that enables a user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving an indication of the user's presence on the co-users' own user-definable co-user lists.

142. The graphical user interface of claim 141 wherein the preferences interface enables the user to control the perception, by co-users, of the indication of the user's presence on the electronic network system by selectively blocking co-users from adding the user to their associated user-definable co-user lists.

143. The graphical user interface of claim 141 wherein the preferences interface enables the user to enter preferences to block co-users from adding the user to their associated user-definable lists.

144. The graphical user interface of claim 141 wherein the preferences interface enables the user to enter one or more co-users expressly permitted to perceive the indication of the user's presence on the electronic network system.

145. The graphical user interface of claim 141 wherein the preferences interface enables the user to enter one or more co-users not permitted to perceive the indication of the user's presence on the electronic network system.

146. The graphical user interface of claim 141 wherein the preferences interface further enables the user to block the co-users from using the electronic network system to communicate with the user.

147. A computer program product embodied in a tangible computer-readable medium, the computer program product including instructions that, when accessed, result in a computer performing operations comprising:
presenting a graphical user interface to a user of an electronic network system, wherein the graphical user interface includes a user-definable co-user list that enables perception of indications of co-users' presence on the electronic network system; and
enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists.

148. The computer program product of claim 147 wherein enabling the user to control the perception of the indication of the user's presence includes enabling the user to control the perception, by co-users, of the indication of the user's presence by selectively blocking co-users from adding the user to their associated user-definable co-user lists.

149. The computer program product of claim 147 further comprising instructions that, when accessed, result in a computer tracking the presence of the user and the co-users on the electronic network system.

150. The computer program product of claim 147 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes enabling the graphical user interface to receive preferences from the user to block the co-users from adding the user to their associated user-definable lists.

151. The computer program product of claim 147 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes:
receiving preferences from the user; and
creating an inclusion list based on the preferences received from the user.

152. The computer program product of clam 151 wherein the inclusion list contains a list of co-users expressly permitted by the user to perceive the indication of the user's presence on the electronic network system.

153. The computer program product of claim 152 wherein only the co-users contained in the inclusion list are permitted to perceive the indication of the user's presence on the electronic network system.

154. The computer program product of claim 147 wherein enabling the user to control the perception, by co-users, of the indication of the user's presence includes:
receiving preferences from the user; and
creating an exclusion list based on the preferences received from the user.

155. The computer program product of claim 154 wherein the exclusion list contains a list of co-users not permitted by the user to perceive the indication of the user's presence on the electronic network system.

156. The computer program product of claim 147 wherein enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists comprises enabling the user to block the co-users from using the electronic network system to communicate with the user.

157. A system for enabling a user to control perception, by co-users, of an indication of the user's presence on an electronic network system, comprising:
means for presenting a graphical user interface to a user of an electronic network system, wherein the graphical user interface includes a user-definable co-user list that enables perception of indications of co-users' presence on the electronic network system; and
means for enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists.

158. The system of claim 157 wherein the means for enabling the user to control the perception, by co-users, of the indication of the user's presence includes means for enabling the user to control the perception of the indication of the user's presence by selectively blocking co-users from adding the user to their associated user-definable co-user lists.

159. The system of claim 157 wherein the means for enabling the user to control perception, by co-users, of an indication of the user's presence on the electronic network system by selectively blocking co-users from perceiving the indication of the user's presence on the co-users' own user-definable co-user lists comprises means for enabling the user to block the co-users from using the electronic network system to communicate with the user.