Abstract:
Embodiments of the subject invention relate to systems, methods, and devices providing a reduced number of selectable inputs that enable efficient communication. One aspect of what is disclosed are embodiments of a systematic code, which systematic code enables efficient communication. Another aspect of the invention is the implementation of embodiments of a systematic code on interactive devices, thereby enabling efficient communication using such interactive devices.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of U.S. patent application Ser. No. 10/852,739, filed May 24, 2004, entitled “SYSTEMS, METHODS AND DEVICES FOR EFFICIENT COMMUNICATION UTILIZING A REDUCED NUMBER OF SELECTABLE INPUTS”, the entirety of which is hereby incorporated herein by reference. 
    
    
     FIELD OF USE 
     The present invention relates to systems, methods, and devices providing a reduced number of selectable inputs that enable efficient communication. One aspect of what is disclosed are embodiments of a sign language code enabling efficient non-verbal communication. Another aspect of the invention is the implementation of embodiments of a systematic code on interactive devices, thereby enabling efficient communication using such interactive devices. 
     BACKGROUND 
     The embodiments of the invention disclosed herein are systems, methods, and devices providing a reduced number of selectable inputs that enable efficient communication, where such communication is taken to broadly encompass the exchange of thoughts, messages, information, etc., by signals, writing, speech, etc. For some embodiments, the systems, methods, and devices may be manually signed without a device, providing efficient non-verbal communication. For other embodiments, the systems, methods, and devices for efficient communication are implemented on an interactive device. What is meant by interactive device is a device that responds to user activity, where the activity may be related to various stimuli, such as mechanical, light, or sound, or related to human senses such as touch, sight, or hearing and the like. 
     The foundation of systems, methods, and devices for efficient communication disclosed herein has been described in Goren U.S. Pat. No. 6,741,235, and is based on a binary code of a primary, or control input, followed by a secondary input. The control input is associated with an entry chosen from the set of letters, numbers, characters, symbols, punctuation marks, commands, and the like. Associated with the control input are secondary inputs chosen from a larger set of letters, numbers, characters, symbols, punctuation marks, and the like. The sequential execution of a control input followed by a secondary input is then the unique signature for a letter, number, character, symbol, punctuation mark, command, and the like. 
     In some embodiments, a system and method based on the binary code of control and secondary inputs is the basis of a sign language code. Embodiments of such a sign language code having a reduced number of selectable inputs may be used independent of any device, thereby enabling efficient non-verbal communication. Additionally, unlike the American Sign Language, the British Sign Language and its offshoot, the Deafblind Manual Alphabet, the embodiments of the invention disclosed herein use a sign language code for efficient communication that does not rely upon ambiguous one or two-handed hand movements that thereby create ambiguous characters. Embodiments of the sign language code disclosed herein utilize a series of two finger movements, of which each set of two finger movements is a unique signature for each letter of the alphabet, or number, etc. Further, all of the letters of the alphabet, or numbers, etc., may be communicated utilizing only one hand. Embodiments of the sign language code are suited for implementation on an interactive device. 
     In other embodiments, the systems, methods, and devices providing a reduced number of selectable inputs enable efficient communication on interactive devices. Currently, interactive devices, including telecommunication, computation, control, and recreational devices are increasingly becoming compact and mobile. These interactive devices include personal digital assistants (PDAs), watches, mobile phones, pagers, e-mail devices, web appliances, web tablets, tablet PCs, game devices, and remote controls, by way of example. Many of these interactive devices are increasingly becoming wirelessly interconnected. 
     Input into interactive devices may be accomplished by input devices that are actuated mechanically, or by a variety of other stimuli, such as light and sound. In that regard, human user input may be manually actuated, or otherwise mechanically actuated by sensors associated with hand or eye movement, or voice actuated, or combinations thereof. Likewise, such interactive devices may respond to a human user with output that is mechanical, audial, or visual in nature, or combinations thereof. As will be discussed in more detail subsequently, given the various sensory modes that input may be entered and output may be manifested using an interactive device, embodiments of the systems, methods, and devices of the invention disclosed herein may be suited to assistive technologies. Though embodiments of the systems, methods, and devices of the disclosed invention are suited for human use, they are also amenable for use with automated systems. 
     In one aspect of what is contemplated, input into such interactive devices may be actuated using a variety of manually activated devices. One example of embodiments of manually activated devices are a hand mounted device having contacts or sensors, texting mouse, or a full-sized control lever or joy stick, or the like. Some embodiments of the subject invention address a need for enabling efficient communication on interactive devices having reduced-size input components. Such reduced-size input components currently have several drawbacks relating to critical user interface issues, such as ergonomic comfort, accuracy, and speed of inputting. In some aspects of what is contemplated, exemplary smaller manually activated input components may be a variety of switches, such as toggle, pushbutton, slide, rocker, rotary, or LCD programmable switches, or reduced-size control levers or joy sticks, and the like. In other aspects of what is contemplated, exemplary smaller input components may be touch screens, keypads, touch pads, and keyboards, and the like, which are commonly used for entering or inputting thoughts, messages, information, etc into smaller interactive devices. 
     One set of approaches for inputting thoughts, messages, information, etc into smaller interactive devices has been to utilize the full capability of a QWERTY keyboard in a reduced format form. For instance, touch-sensitive keyboards or smaller keyboards on smaller screens of compact interactive devices have been used, resulting in keys too small for ergonomic comfort. Additionally, there is an increase in error rate and decrease in input rate associated with these smaller keyboards, due to the accidental touch by the user of more than one key at a time. Still another approach involves providing a reduced-size QWERTY keyboard that utilizes a thumb board. For many, thumbing on a reduced-size QWERTY keyboard is awkward, resulting in that approach failing to meet the ergonomic comfort criteria, and additionally resulting in a decreased input rate. 
     Still other approaches utilize keypads as input components. Keypads are common on compact interactive devices, such as personal digital assistants (PDAs), watches, mobile phones, pagers, e-mail devices, web appliances, web tablets, tablet PCs, game devices, and remote controls, etc. An example of an approach for making entries on keypad devices includes disambiguating methods such as multi-tapping on a key until the desired letter on that key is displayed. For example, the letter “r” is displayed by tapping three times on the “7” key. With a disambiguating program, lists of words are created from the matching of the sequence of keystrokes to complete dictionaries. A number of keypad entry devices utilize a software program to disambiguate the plurality of letters appearing on the keys of such device. A disambiguating computer processes an entered keystroke sequence by matching the different combinations of letters associated with each keystroke to a stored list of words. The words matching the combinations of letters are then displayed for user selection. This method requires a user to enter a combination of keystrokes and then choose from a list of words. The list the user must select from is often quite long requiring the user to read through each potential choice to find the desired word. This type of input, while reducing the error rate associated with the stylus, is much slower and often frustrating to the user due to the need to press a sequence of keys and then filter through a list of computer generated choices. Other limitations of disambiguating methods include limiting the user to the set of choices provided by the computer, as well as being limited when more than one language is used. 
     It is thereby desirable to create additional systems, methods, and devices using a small set of inputs that are effective in providing accuracy and ease of communication. Such systems, methods, and devices may be used independent of any device to provide efficient non-verbal communication. However, it is desirable that embodiments of the systems, methods, and devices of the subject invention be further compatible with a broad range of compact interactive devices in order to provide ease of use and ergonomic comfort, as well as to fulfill the goal of portability, interconnectivity, and flexible for use with a variety of applications and other software programs. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to efficient systems, methods, and devices of communication; e.g. systems, methods, and devices for sending, receiving, displaying, and saving thoughts, messages, information, etc., efficiently. One aspect of embodiments of the subject invention relates to non-verbal communication where no device is necessary. In other embodiments, the systems, methods, and devices are implemented on an interactive device, where input is typically manually actuated, or otherwise mechanically actuated by sensors associated with hand or eye movement, or voice actuated, or combinations thereof. Moreover, where manual actuation is indicated, it is desirable that embodiments of the systems, methods, and devices of the subject invention be adapted for convenience of input using a single hand. 
     Embodiments of systems, methods, and devices of a sign language code are disclosed that require no device, but are suited for implementation on a variety of interactive devices. Embodiments of the sign language code are created using a binary sequence of thumb and finger movements which are assigned to letters, numbers, characters, symbols, punctuation marks, commands, and the like. In some embodiments, one hand is used is used to create the code, while alternative embodiments may use both hands. 
     The embodiments of the sign language code of the subject invention are easy to learn. The ease of learning is illustrated by using communication of letters, as an example: (1) there are only five vowels, which are the basis of the control inputs; (2) each vowel has a set of no more than five associated consonants, which are secondary inputs; (3) each vowel is associated with a finger, for example: A: thumb, E: index finger, I: middle finger, O: ring finger, and U: small finger; (4) the first finger movement is associated with the control input of a vowel and the second finger movement identifies the secondary input of the letter associated with the control input. In this fashion, the signing of a control input followed by the signing of a secondary input is the unique signature for a letter. This method may also be extended to numbers, characters, symbols, punctuation marks, commands, and the like. 
     For interactive devices, inputs and outputs may be displayed on a display device, such as a display screen. Such devices may have one or more display screens. The display screens are useful for two purposes. First, they may be used for viewing control inputs or secondary inputs of letters, numbers, characters, symbols, punctuation marks, commands, and the like for selection by the user. Second, they may display the text, symbols, or commands, etc. that have been inputted for further processing, such as editing, before the entering, sending, or storing the input. It is further contemplated that instead of a display device, such as one or more display screens, the interactive device may have, for example, voice chip capabilities, so that input and output are communicated via sound. It is still further contemplated that the interactive device may have mechanical means, such as vibration, for communicating to the user. In this regard, though the systems, methods, and devices of the disclosed invention may be used by a variety of end-users, they are suited for assistive technologies. 
     Each manually actuated control input is selected from a set of letters, numbers, characters, symbols, punctuation marks, commands, and the like, and may be displayed on a display device, or the like, as discussed in the above. The control input initially may be identified or assigned a single control input character, and is associated with a selection of secondary inputs that encompass a larger set of letters, numbers, characters, symbols, punctuation marks, commands, and the like. After entering a specific control input, a secondary input is selected and entered on the input device. In this fashion, the entering of a control input followed by the entering of a secondary input is the unique signature for an inputted entry chosen from a set of letters, numbers, characters, mathematical symbols, punctuation marks, and the like. This well defined association between control and secondary inputs and inputted entries allows the user to easily and efficiently input text, numbers, symbols, commands, etc. to a variety of devices. 
     When the embodiments of the systems, methods, and devices of the subject invention are implemented on interactive devices, the control inputs and secondary inputs can be entered by a number of manually actuated devices, for example: 1.) hand-mounted devices actuated by hand movements, such as a glove with contacts or sensors, 2.) actuating pads or buttons on a mouse, 3.) switches, lever devices, or joy sticks, and the like, or 4.) keys on a keypad or keyboard, or touch screen, etc. Using the systems, methods, and devices disclosed herein, the entries such as letters, numbers, characters, symbols, punctuation marks, commands, and the like, and combinations thereof are easily entered into an interactive device in a simple, consistent, and predetermined manner. 
     Accordingly, embodiments of the systems, methods, and devices disclosed herein address a need in the art for efficient communication, either with or without the use of an interactive device. In the case of the use of smaller interactive devices, a need to take into account important user interface issues, such as ergonomic comfort, as well as accuracy and speed of inputting, is specifically addressed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A-1E  show examples of communicating information using hand signals. 
       Table  1 A displays an embodiment of a sign language code for communicating letters using hand signing. 
       Table  1 B displays an embodiment of a sign language code for communicating numbers using hand signing. 
       Table  1 C displays an embodiment of a sign language code for communicating punctuation marks and commands using hand signing. 
         FIGS. 2A-2F  show an embodiment of a device for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
       Table  2 A displays an embodiment of inputting letter entries into interactive devices using a manually actuated input device, such as that of  FIG. 2A . 
       Table  2 B displays an embodiment of inputting numeric entries into interactive devices using a manually actuated input device, such as that of  FIG. 2A . 
         FIG. 3  is an embodiment of a mouse for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
       Table  3 A displays an embodiment of an input sequence for alphabet entries using the mouse of  FIG. 3 . 
       Table  3 B displays an embodiment of an input sequence for numeric entries using the mouse of  FIG. 3 . 
       Table  3 C displays an alternative embodiment of an input sequence for numeric entries using the mouse of  FIG. 3 . 
         FIG. 4A  shows an embodiment of a device with a control lever for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
         FIG. 4B  shows an alternative embodiment of a device with a control lever for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
         FIG. 4C  shows an embodiment of a toggle switch for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication.  FIG. 4D  shows a diagram of toggle switch positions, when the switch is viewed from the top. 
         FIGS. 5A and 5B  are 12 position keypads in a 3×4 array, for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication.  FIG. 5A  is a standard 12 position keypad, and Fig. B is an alternative embodiment of a 12 position keypad for inputting information. 
       Table  5 A displays an embodiment of inputting letter entries using the keypads of  FIGS. 5A and 5B . 
       Table  5 B displays an embodiment of inputting numeric entries using the keypads of  FIGS. 5A and 5B . 
       Table  5 C displays an alternative embodiment of inputting numeric entries using the keypads of  FIGS. 5A and 5B . 
         FIG. 6  is a standard 15 position keypad in a 3×5 array, for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
       Table  6 A displays an embodiment of inputting letter entries using the keypad of  FIG. 6 . 
       Table  6 B displays an embodiment of inputting numeric entries using the keypad of  FIG. 6 . 
       Table  6 C displays an alternative embodiment of inputting numeric entries using the keypad of  FIG. 6 . 
         FIGS. 7A and 7B  show alternative embodiments of a 15 position keypad for manual actuation of input to interactive devices using embodiments of systems, methods, and devices for efficient communication. 
       Table  7 A displays an embodiment of inputting vowels using the keypad of  FIG. 7A . 
       Table  7 B displays an embodiment of inputting vowels using the keypad of  FIG. 7B . 
         FIG. 8A  is an embodiment of an exemplary mobile communication device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
         FIG. 8B  is an alternative embodiment of an exemplary mobile communication device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
         FIG. 8C  is still another embodiment of an exemplary mobile communication device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
         FIG. 9A  is an embodiment of an exemplary PDA watch device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
         FIG. 9B  is an alternative embodiment of an exemplary PDA watch device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
         FIG. 9C  is still another embodiment of an exemplary PDA watch device that may utilize embodiments of the systems, methods, and devices disclosed herein. 
     
    
    
     DETAILED DESCRIPTION 
     Sign Language Code 
     Embodiments of the sign language code are based upon a first finger movement that identifies a control input chosen from a set of letters, numbers, characters, mathematical symbols, punctuation marks, commands, and the like, followed by a second finger movement identified with a secondary input chosen from a larger set of letters, numbers, characters, mathematical symbols, punctuation marks, commands, and the like. In this fashion, the signing of a control input followed by the signing of a secondary input is the unique sign for a letter, number, character, symbol, punctuation mark, command, and the like. One embodiment of the sign language code uses one hand to create letters, numbers, etc. for communicating, while alternative embodiments may use both hands. 
     One embodiment of the sign language code is shown in  FIGS. 1A-1E . In Table  1 A, an embodiment of the sign language code for the alphabet is shown. For the control inputs, the thumb  101  and fingers  102 - 105  are each assigned a single letter representing a vowel. Associated with each vowel are not more than five consonants. As can be seen in  FIGS. 1A-1E , the thumb  101  touched to the palm  106 , is the control input for the letter “A”  112 . Similarly, index finger  102  touched to the palm  106 , is the control input for the letter “E”  114 , while the middle finger  103  touched to the palm  106  is the control input for the letter “I”  116 ; the ring finger  104  touched to the palm  106  is the control input for the letter “O”  118 ; and finally, the little finger  105  touched to the palm  106  is the control input for the letter “U”  120 . 
     Further, each of the control inputs is associated with a set of second inputs, and as can be seen in Table  1 A. In the embodiment of  FIGS. 1A-1E , the secondary input for entering vowels is the touching of a plurality of fingers  102 - 105  to the palm  106 , represented in  FIGS. 1A-1E  as  110 . Table  1 A displays the control and secondary inputs for entering letters using one embodiment of the sign language code for communication. Shown in Table  1 B is an embodiment of control inputs and secondary inputs for communicating numbers. Various ways of communicating numbers will be discussed in more detail subsequently. 
       FIGS. 1A-1E  depict an embodiment of the sign language code using one hand, for ease of use to the end user. Variations of this will be apparent to one of skill in the art. For example, in one embodiment of the sign language code, letters may be communicated using one hand, while numbers may be communicated with the other hand. In another embodiment of the sign language code, letters may be communicated with the hand in one position, while numbers are communicated with the hand in another position, and symbols in still another position. In still another example, in some embodiments, letters may be communicated with control inputs and secondary inputs having the thumb and fingers completely touching the palm, while numbers are communicated with the fingers only partially deflected towards the palm. In still other embodiments, fingers touching other fingers or the thumb may be used for the designation of control inputs and secondary inputs, such as the example given in Table  1 C for communicating punctuation marks and commands. 
     As an example of how the sign language code could be used to communicate words, thoughts, and ideas, etc., the greeting, “Good morning”, would be communicated as (see table  1 A and  1 C): 
       114 - 114 ,  118 - 110 ,  118 - 110 ,  112 - 116  (tip of thumb to tip of index finger) 
       116 - 118 ,  118 - 110 ,  118 - 116 ,  116 - 120 ,  116 - 110 ,  116 - 120 ,  114 - 114   
     Hand-Mounted Interactive Device 
     While the sign language code described above requires no interactive device, it is further contemplated in other embodiments where the use of an interactive device is indicated, that there may be no need for a keypad or display screen. In some embodiments, the input component of an interactive device is a hand-mounted device with contacts or sensors, such as the glove of  FIG. 2A . 
     Similarly to the description given for  FIGS. 1A-1E , in  FIGS. 2B-2F , the thumb  201  and fingers  202 - 205  are each assigned a single vowel and are used to represent the control inputs. However, a variation of what is depicted in  FIGS. 1A-1E  is shown in this embodiment. In the embodiment shown in  FIGS. 2B-2F , the little finger  205  bent towards the palm  206 , is the control input for the letter “A”  212 , the ring finger  204  bent towards the palm  206 , is the control input for the letter “E”  214 , the middle finger  203  bent towards the palm  206 , is the control input for the letter “I”  216 ; the index finger  202  bent towards the palm  206 , is the control input for the letter “O”  218 ; and finally, the thumb  201  bent towards the palm  206 , is the control input for the letter “U”  220 . Clearly, in this embodiment, two additional variations of the sign language code are utilized: 1.) The partial bending of thumb and fingers vs. the full bending of the fingers for the embodiments of  FIGS. 1A-1E . 2.) An alternative sequence of fingers are assigned for the control inputs. These variations are illustrative of the versatility with which embodiments of the sign language code can be created. 
     As previously described for the embodiments of the sign language code, each of the control inputs is associated with a set of secondary inputs, and as can be seen in Tables  2 A and  2 B. In the embodiment shown in  FIGS. 2B-2F , the secondary input for entering vowels is the partial bending of a plurality of fingers  202 - 205  towards the palm  206 , represented in  FIGS. 2B-2F  as  210 . Table  2 A displays the control and secondary inputs for entering letters with this embodiment utilizing a hand-mounted input device, such as the glove of  FIG. 2A . This embodiment, and the embodiments of  FIGS. 1A-1E , are exemplary of the variety of ways finger movements may be created and assigned to control inputs and secondary inputs for designating letters, numbers, characters, symbols, punctuation marks, commands, and the like, for either the sign language code, or a hand-mounted device. 
     Shown in Table  2 B is an embodiment of control inputs and secondary inputs for inputting numbers on an interactive device using a hand-mounted input device, such as the glove of  FIG. 2A . As previously shown in Table  1 B for the sign language code, numeric entries can also be entered in a similar manner using a hand-mounted input device. An additional embodiment of control inputs and secondary inputs for either the sign language code, or the hand-mounted input device is shown in Table  2 B. Using either of the embodiments of Table  1 B or  2 B, numeric entries can be ready built for either the sign language code or the hand-mounted input device. As an example, referring to Table  1 B and  FIGS. 1A-1E , and Table  2 B and  FIGS. 2B-2F , the number “1948” can be entered as the following string of inputs: 
     Table  1 B:  112 - 112 ,  114 - 118 ,  112 - 118 ,  114 - 116  or 
     Table  2 B:  218 - 218 ;  212 - 218 ;  214 - 216   
     Additionally, as discussed for the multitude of finger movements possible for the sign language code, since sensors may be placed in a variety of locations on the fingers and hands, it is possible to create unique entries for a variety of sets of characters such as letters, numbers, symbols, punctuation marks, commands, and the like. The arrangement of contact points on a hand-mounted device, such as a glove, is optimized in terms of efficiency and consistency to provide the utility of a keypad for entering a desired character. The predetermined arrangement of contact points is optimized for each embodiment of the method and system disclosed herein. In some embodiments, contacts or sensors may be placed on both hands. In other embodiments, sensors may be placed for the use of eye movements. In still other embodiments, the hand on which the device is mounted may be robotic or prosthetic. 
     For the hand-mounted, manually actuated embodiments described herein, such as the glove of  FIG. 2A , the letters, numbers, characters, symbols, punctuation marks, commands, and the like, are entered by the user, and may be stored using a storage medium and if desired may be displayed on one or more display screens  207 , shown in  FIGS. 2A-2F . Alternatively, input and output may be communicated to the user via sound, such a voice chip, or via mechanical means, such as vibration, as previously mentioned. Additionally, some embodiments may be capable of networking with other interactive devices, software programs, and the Internet. 
     Texting Mouse Embodiment 
     Still other embodiments of the system and method for inputting information use a mouse as the input device. In reference to  FIG. 3 , keys or pads on a mouse, are arranged efficiently for ease of use for entering data and information. Shown in  FIG. 3 , pads  301  and  302  are actuated using the thumb, pad  303  is actuated using the index finger, pad  304  is actuated using the middle finger, pad  305  is actuated using the ring finger, and pad  306  (indicated but not shown) is actuated using the little finger. 
     Each pad  301 - 306 , may be assigned its own respective single letter that represents a control input. In one embodiment, the thumb  302  is assigned the letter “A”, the index finger  303  is assigned the letter “E”, the middle finger  304  is assigned the letter “I”, the ring finger  305  is assigned the letter “O” and the small finger  306  is assigned the letter “U”. A user selects one of the control inputs and therefore the letter assigned to that control input by pressing the desired key. As previously described above, the control input for “A” is associated with the ordered set of second inputs A, B, C and D; the control input for “E” is associated with the ordered set of second inputs E, F, G, H; the control input for “I” is associated with the ordered set of second inputs I, J, K, L, M and N; the control input “O” is associated with the ordered set of second inputs O, P, R, S, and T; and the control input “U” is associated with the ordered set of second inputs U, V, W, X, Y and Z. Table  3 A displays an embodiment for an input sequence for letters using a mouse. 
     As previously described for the hand-mounted device, numeric entries can also be entered in a similar manner using a mouse. Tables  3 B and  3 C display embodiments for input sequences for numbers using a mouse. Using either of the embodiments of Table  3 B or  3 C, numeric entries can be ready built. As an example, referring to Tables  3 B and  3 C, the number “1948” can be entered as the following string of inputs: 
     Table  3 B:  302 - 302 ,  303 - 305 ,  302 - 305 ,  303 - 304 ; or 
     Table  3 C:  305 - 305 ;  302 - 305 ;  303 - 304 . 
     It may be readily appreciated by a person skilled in the art that, since the control input numerals “0” and “5” and their respective associated numerals contain all of the digits to enter a desired number (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9), the number of inputted numerals can range from one to whatever number is desirable. The same reasoning applies to the expanded list of entries shown in Table  3 C. Further, analogous to the plurality of embodiments created by the expanded set of finger positions for the sign language code and hand-mounted input device, additional buttons or pads on the mouse may also give rise to alternative embodiments of mouse control input and secondary input combinations. Such expanded embodiments of control inputs and secondary inputs may be useful for creating a wide range of sets of letters, numbers, characters, symbols, punctuation marks, commands, and the like. Additionally, the selected entry may be stored on a storage medium and if desired may be displayed on one or more viewing areas. Alternatively, input and output may be communicated to the user via sound, such a voice chip, or via mechanical means, such as vibration, as previously mentioned. 
     Switch, Control Lever, or Joy Stick Entry 
     Another system and method disclosed that uses input devices such as switches, lever devices, or joy sticks, and the like.  FIG. 4A  and  FIG. 4B  show an input device  400  using a control lever  410 . Though the control lever may be grasped by a hand, the end of the control lever is designed for ease of engagement of a single digit, making control with the thumb or a finger possible.  FIG. 4A  shows a conventional control lever or joy stick, while  FIG. 4B  shows an alternative embodiment having a reduced-size control lever, or joy stick. While  FIG. 4A  and  FIG. 4B  display a control lever or joy stick, it is appreciated by those in the art that numerous switches may also be used in such an input device. The embodiments using switches, lever devices, or joy sticks, and the like, may be used in conjunction with one or more display screens  430 ,  440 , as shown in  FIGS. 4A and 4B , respectively. Alternatively, input and output may be communicated to the user via sound, such a voice chip, or via mechanical means, such as vibration, as previously mentioned. 
       FIG. 4C  shows a toggle switch  410  as an exemplary switch on input device  450 , though a wide variety of switches, such as toggle, pushbutton, slide, rocker, rotary, or LCD programmable switches, may be used.  FIG. 4C  is illustrative of a switch device, such as  450 , which may be used without a display screen, or other means utilized by interactive devices for communicating input and output to a user. In such embodiments, the binary code of the systems, methods, and devices of the invention disclosed herein, based on the control inputs and their associated secondary inputs is readily inputted into such devices for efficient communication. Though a switch, such as a toggle switch is used in  FIG. 4C  as an exemplary device for use without a display screen, etc., those of skill in the art will recognize that numerous types of control levers, and joy sticks, and the like may be likewise used. 
       FIG. 4D  is a diagram of positions for one embodiment of input entered into an interactive device using a switch, lever device, or joy stick. This diagram is viewed from above a switch, lever, or joy stick, such as the lever device of  FIGS. 4A and 4B , or the toggle switch of  FIG. 4C . In this embodiment, the interactive device has an input device of a switch, lever device, or joy stick that is upright in the middle of the input area. The user can move forward, “F”, to toggle through vowels, as exemplary control inputs; or back, “B”, to toggle through consonants, as exemplary secondary inputs associated with the vowels. Additionally, in this embodiment, the user may toggle left, “L”, or toggle right, “R”, for inputting, as an example, commands, such as a backspace command (i.e. “L”) or for a space command (i.e.“R”). Further, the user can press down, and then engage the switch, control lever, or joy stick in an additional series of control inputs and secondary inputs. 
     In one embodiment, vowels are inputted by moving a switch, control lever, or joy stick forward, “F”: (1) moving slightly forward displays the letter A and (2) moving farther forward scrolls through remaining vowels. When the desired vowel is reached, the user then moves the switch, control lever, or joy stick back to middle position and the device will enter that vowel. Since the list of vowels is short, the user can keep scrolling forward to repeat the list of vowels. For instance, for the A, the switch, control lever, or joy stick is moved forward and the A will be displayed. Moving the control lever back to the middle will enter the letter A. For the letter O, the switch, control lever, or joy stick is moved forward until the vowel O is displayed, and then move the control lever back to the middle. 
     In a similar fashion, the consonants are selected by using a switch, control lever, or joy stick to scroll forwards to the control input vowel associated with the desired consonant. Upon reaching the correct control input vowel, the user moves the switch, control lever, or joy stick through the middle to the back, “B” position. The desired consonant is selected by scrolling through the secondary input selections. The appropriate secondary input is selected by moving the switch, control lever, or joy stick to the central position. For instance for the word “vowel” the user moves the control lever to the vowel area and toggles through the vowels until the vowel “U” is reached. The user then moves the control lever back to the consonant area and the first letter displayed will be the first consonant following the “U” which is V, the user then moves the control lever to the middle or directly forward to the vowel area and toggles to the vowel “O” and back to the middle area and then forward to the vowel area for the vowel “U” and back to the consonants to toggle to the “W”, then forward to the vowels to toggle to the “E” and back to the middle and then forward to the vowel I and then back to the consonants to toggle to the letter “L”. 
     In one embodiment, numbers are reached by pushing down on the control lever and then moving forwards between 0 and 9. In other words when the control lever is pushed down and moved forward, “F”, numerals 0-9 can be scrolled on the display screen instead of vowels. In one embodiment, symbols are selected by depressing the switch, control lever, or joy stick, and moving it back, “B”. The user can scroll through a selection of symbols in that fashion. In one embodiment, the user accesses a shift function by depressing the switch, control lever, or joy stick, and moving it to the left, to access commands, for example for capitalizing a letter. In another embodiment, pushing down and moving the control lever to the right can activate scrolling through words, numbers, punctuation, symbols or for accessing websites or email addresses, or other such letters, numbers, characters, symbols, punctuation marks, commands, and the like that appear on a keyboard or keypad. 
     Though the examples given in the above are for a 4 actuator position switch, control lever, or joy stick, or the like, with one shift position, it will be appreciated by those in the art that such devices come with a wide variety of actuator positions; from one to multiple actuator positions, as well as a variety of features, such as programmable LCD displays, or lighted displays, or the like. 
     Keypad Entry 
     A device used in accordance with methods and of the invention has a keypad, as shown in  FIGS. 5A ,  5 B,  6 ,  7 A, and  7 B. Keypads are common input components for interactive devices such as personal digital assistants (PDAs), watches, mobile phones, pagers, e-mail devices, web appliances, web tablets, tablet PCs, game devices, and remote controls, etc. A user viewing area is used for displaying a short list of letters or numbers in an arranged order. 
     One embodiment of systems, methods, and devices for efficient communication using an interactive device with a keypad is shown in  FIGS. 5A and 5B , and further described in Table  5 A. In  FIG. 5A , a standard 12 position, 3×4 keypad  500  is shown, with keys  501 - 512 . Keys  502 - 506  of  FIG. 5A  are control inputs, each associated with a vowel from the list of vowels A, E, I, O and U, respectively, while key  501  of  FIG. 5A  is the secondary input for entry of such vowels. By entering a control input selected from keys  502 - 506  followed by a secondary input using key  501 , a vowel is selected. This is demonstrated in Table  5 A, where in first row a control input is identified with a vowel; i.e. “A” is identified with key  502 , “E” is identified with key  503 , “I” is  504 , “O” is identified with key  505 , and “U” is identified with key  506 . As can be see in Table  5 A, the selection of control inputs using key  502 - 506  followed by the secondary input using key  501  selects a vowel using this system and method. 
     Additionally, each control input representing a vowel is associated with a selection of secondary inputs. The control input for “A” is associated with the consonants immediately following, which are B, C, D. The control input for “E” is associated with the consonants F, G, H, the control input for “I” is associated with the consonants J, K, L, M, N, the control input for “O” is associated with P, Q, R, S, T, and the control input for “U” is associated with V, W, X, Y and Z. Keys  501 - 506  of  FIG. 5A  are used as secondary inputs for inputting a single character from which the entire alphabet can be inputted, as shown in Table  1 A. After entering a specific control input, followed by entering a specific secondary input, the device enters and may store the selected entry representing a letter, number, character, mathematical symbol, punctuation mark, and the like. If desired, the selected entry may be displayed on a viewing area. 
     In reference to Table  5 A, it is clear that the selection and entering of a control input, followed by the selection and entering of a secondary input is a unique signature for a letter, from which text entries can be readily built. As an example, “phone home” would be a string of inputs as:  505 - 502 ,  503 - 504 ,  505 - 501 ,  504 - 506 ,  503 - 501  (space)  503 - 504 ,  505 - 501 ,  504 - 505 ,  503 - 501 . 
     With a 12 position keypad, numbers are inputted as shown in Tables  5 B and  5 C, which are exemplary embodiments of using the sequential entering of control inputs and secondary inputs for numeric entries. For the embodiment shown In Table  5 B, the control input keys are  501  and  502 , and are associated with the numerals “0” and “5”, respectively, and the secondary input keys are  501 - 505 . By entering a control input selected from keys  501 - 502  followed by entering a secondary input selected from keys  501 - 505 , a number between 0 and 9 is selected. Another embodiment of a system for entering numbers is shown in Table  1 C. In this embodiment, control inputs, as well as secondary inputs utilize keys  501 - 509 , and key  511 , and thereby a number between 0 and 99 may be selected. 
     Using either of the embodiments of Table  5 B or  5 C, numeric entries can be ready built. As an example, referring to Table  5 B, the number “1948” can be entered as the following string of inputs: 
     Table  5 B:  501 - 501 ,  502 - 505 ,  501 - 504 ,  502 - 504 ; or 
     Table  5 C:  502 - 511 ;  505 - 509   
     It may be readily appreciated by a person skilled in the art that, since the control input numerals “0” and “5” and their respective associated numerals contain all of the digits to enter a desired number (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9), the number of inputted numerals can range from one to whatever number is desirable. The same reasoning applies to the expanded list of entries shown in Table  5 C. 
     From Tables  5 A,  5 B, and  5 C, it is clear that alphanumeric input can be easily entered with a keypad input device using this system and method. Though letters and numbers are given herein as an example, it will be clear to one of ordinary skill in the art that additionally, sets of characters such as mathematical symbols, punctuation marks, and the like, and combination thereof, can also be created using this system and method. 
     Additionally, as previously discussed for the examples of embodiments of the sign language code, hand-mounted device, texting mouse, and switches, control levers and joy sticks, and the like, a variety of embodiments may be drawn from the different designations for assigning keys to control inputs and secondary inputs. For example, an alternative embodiment to  FIGS. 5A and 5B  might have the control inputs placed in a more vertical arrangement by having the control inputs A, E, I, O and U assigned to keys  501 ,  504 ,  507 ,  510 , and  511 , respectively, with the secondary input for the vowels, or the V 2  key, designed by key  505  or  508 . The secondary input functions may be assigned to keys  502 ,  503 ,  506 ,  509 , and  512 . In still another embodiment, the control inputs A, E, I, O and U assigned to keys  501 - 505 , respectively, with the secondary input for the vowels, or the V 2  key, designed by key double tapping the vowel control key. In this embodiment, “A” is  501 - 501 , “E” is  502 - 502 , “I” is  503 - 503 , “O” is  504 - 504 , and “U” is  505 - 505 . The secondary control inputs may be assigned to keys  507 - 511 . What is described above is meant to provide some examples of the various ways that the keys may be assigned to control inputs and secondary inputs. As will be appreciated by those of skill in the art, other assignments of keys to control inputs and secondary inputs can be made without departing from the scope of the disclosure this invention. 
       FIG. 5B  shows an embodiment of a keypad with the control inputs prominently displayed on the keys. This embodiment of the keypad may be useful as an input device on interactive devices having display screens. By pressing a control input key, the selection of secondary inputs is then shown on a display screen. 
     As an example of such an embodiment where the interactive device has a display screen, in referring to  FIG. 5B  and Table  5 A, for letter entries, when a user selects key  502 , the display area would show: 
       501 :A  502 :B  503 :B  504 :D 
     Likewise, when a user selects key  503 , the display area would show: 
       501 :E  502 ::F  503 :G  504 :H 
     Similarly, when a user selects key  504 , the display area would show: 
       501 :I  502 :J  503 :K  504 :L  505 :M  506 :N 
     When a user selects key  505 , the display area would show: 
       501 :O  502 :P  503 :Q  504 :R  505 :S  506 :T 
     Finally, when a user selects key  506 , the display area displays: 
       501 :U  502 :V  503 :W  504 :X  505 :Y  506 :Z 
     As another example of this embodiment, referring to  FIG. 5A , Table  5 C, for numeric entries, when a user selects key  501 , the display area would show: 
       501 : 0   502 :: 1   503 : 2   504 : 3   505 : 4   506 : 5   507 : 6   508 : 7   509 : 8   511 : 9   
     Likewise, when a user selects key  502 , the display area would show: 
       501 : 10   502 : 11   503 : 12   504 : 13   505 : 14   506 : 15   507 : 16   508 : 17   509 : 18   511 : 19   
     Similarly, when a user selects key  503 , the display area would show: 
       501 : 20   502 : 21   503 : 22   504 : 23   505 : 24   506 : 25   507 : 26   508 : 27   509 : 28   511 : 29   
     Finally, when a user selects key  511 , the display area displays: 
       501 : 90   502 : 91   503 : 92   504 : 93   505 : 94   506 : 95   507 : 96   508 : 97   509 : 98   511 : 99   
     In this fashion, the display of the secondary input letters on the optional display screen in response to a user pressing a control input reinforces the associating of the secondary input letters each with their own control input letter. Additionally, it is contemplated that users may save their inputs to a storage medium. Further, some embodiments may be capable of communicating with other computing devices, software programs, and the Internet. 
     Another embodiment of the system and method disclosed herein utilizing a keypad as an input device is shown in  FIG. 6 , and further described in Tables  6 A,  6 B, and  6 C. This exemplary keypad is a 15 position keypad, in a 3×5 array of keys. As can be seen from Tables  6 A and  6 B, the principles for the system and method of the disclosed invention for embodiments of the 12 position keypad described are applicable for the 15 position key pad. However, for this embodiment, the secondary input for entering the vowels is key  606 , shown in  FIG. 6 , while all the other keys used for control inputs and secondary inputs are keys  601 - 605 , residing in the first column. This provides the user added convenience of having the majority of all entries made from keys in a single row, and facilitates entry on the 15 position keypad using a single-hand. 
     A person of skill in the art would appreciate that the order and number of buttons in an array may vary without departing from the scope of what is disclosed about the method and system embodiments of inputting information into compact interactive devices. Alternative embodiments of the 15 position keypad  700  are shown in  FIGS. 7A and 7B . Analogous to keypad  500  of  FIG. 5B , the embodiments of keypads  700  represented by  FIGS. 7A and 7B  have the control inputs shown prominently on the keys. By pressing a specific control input key, the secondary inputs are actuated and may be displayed on a display screen 
     Additionally, as previously discussed for the examples alternative embodiments to  FIGS. 5A and 5B , a variety of embodiments may be drawn from the different designations for assigning keys to control inputs and secondary inputs. For example, in  FIG. 7A , the control inputs A, E, I, O and U assigned to keys  701 - 705 , respectively, with the secondary input for the vowels, or the V 2  key, designed by key double tapping the vowel control key. In this embodiment, “A” is  701 - 701 , “E” is  702 - 702 , “I” is  703 - 703 , “O” is  704 - 704 , and “U” is  705 - 705 . The secondary control inputs may be assigned to keys  706 - 710 . for  FIG. 7B , the control inputs would be designated by A” is  711 - 711 , “E” is  712 - 712 , “I” is  713 - 713 , “O” is  714 - 714 , and “U” is  715 - 715 , while the secondary inputs may be assigned to keys  706 - 710 . 
     Though examples have for a keypad with 15 keys in a 3×5 array has been given, in alternative embodiments the keys may be arranged in a 5×3 array. Finally, though keypads having 12 key and 15 keys have been given, the principles described herein apply to any keypad with any number of keys. What is described above is meant to provide some examples of the various ways that the keys may be assigned to control inputs and secondary inputs. As will be appreciated by those of skill in the art, other assignments of keys to control inputs and secondary inputs can be made without departing from the scope of the disclosure this invention. 
     While a display screen is not required for use with a keypad, as shown in  FIGS. 5A ,  5 B,  6 ,  7 A, and  7 B, other embodiments of an interactive device with a keypad or keyboard have one or more display screens, or similar viewing areas, such as an LCD screen. Such display screens or similar viewing areas may be used for displaying a short list of characters or other symbols in an arranged order. In these embodiments, a user-selected letter, number, character, symbol, punctuation mark, or command may be displayed either on a separate portion of the display screen of the same device or on a separate display screen, or on both. Alternatively, input and output may be communicated to the user via sound, such a voice chip, or via mechanical means, such as vibration, as previously mentioned. 
       FIGS. 8A-8C  are renderings of an intact interactive communication device having a reduced-size input component.  FIG. 8A  is a mobile communication device  800  having a reduced-size keypad  810 , reduced-size keys  820 , reduced-size function keys  830 , a display area  840 , a voice input or output device, or both, such as a microphone or a speaker  850 , and an antenna  860 . The keys  820  of keypad  810 , of the device  800  are keys for standard uses, such as dialing, as well for entering control inputs and secondary inputs. The device has separate function keys  830 . 
       FIG. 8B  is an alternative embodiment of a mobile communication device  800  having a reduced-size keypad  810 , reduced-size keys  820 , reduced-size function keys  830 , and separate reduced-size control input and secondary input keys  835  on the side of the mobile communication device for ready actuation by the thumb and fingers of one hand. In the embodiment of a mobile communication device shown in  FIG. 8B , analogous to the example of pads on a texting mouse, there are two control input keys  835  on the right hand side which are actuated by the thumb, and four control input keys  835  on the left side that are actuated by a finger or fingers. As shown in  FIG. 8B , the lower key  835  on the right hand side is the key for actuating the secondary input selection for the vowels, for example, when the entries are letters. Like the embodiment of  FIG. 8A , this embodiment has a display area  840 , a voice input or output device, or both, such as a microphone or a speaker  850 , and an antenna  860 . 
     Though  FIG. 8B  is shown with four control input and secondary input keys  835  on the left side of the interactive mobile device, and two control input and secondary input keys  835  on the right side, it is understood by those of skill in the art, that a variety of arrangements of the keys can be implemented. For example, the mobile communication device  800  of  FIG. 8C , when held in the right hand, has the control input and secondary input keys  835  arranged for easy actuation of the keys using the fingers on the left side of the device. The sixth secondary input key  835  for entering vowels, for example when text is being inputted, is arranged for easy actuation using the thumb on the right side of the device. In an alternative embodiment, the control input and secondary input keys  835  could be placed in an opposite arrangement for ease of use with the left hand. In still other embodiments, the control input and secondary input keys  835  may be located all on one side. 
     The display area  840  of the device  800  of  FIGS. 8A-8C  may display the letters, numbers, characters, symbols, punctuation marks, commands, and the like that the user has selected. In other embodiments, rather than being part of the same keypad  810 , the display area  840  can be viewed on a physically separate display (not shown), thereby allowing the user full use of the keypad  810  and the function keys  830 . Such a physically separate display can be incorporated in the same device, or it can be incorporated into another device that communicates with a device such as  800 . 
     For interactive devices, such as the exemplary mobile communication device  800  of  FIGS. 8A-8C , when a user enters information using keypad  810 , a processor receives the inputted signal, and either displays additional information (such as a set of secondary inputs) on the display area  840  or stores the information inputted by the user on a storage medium (not shown). 
     Using the keypad  810 , control inputs and secondary inputs may be entered. The function keys  830  may actuate a range of functions such as a space bar input, a backspace input, a shift input, and a menu bar input, as well as functions for controlling the display, such as a scroll input. The keypad  810 , may have a plurality of input and function keys, such as in  FIGS. 5A ,  5 B,  6 ,  7 A and  7 B, which are exemplary of the various ways a keypad may be designed. Using a keypad such as  810 , control inputs and secondary inputs for any selection of letters, numbers, characters, mathematical symbols, punctuation marks, or the like, may be made as shown in the tables associated with  FIGS. 1-7 , and previously discussed. 
     In one embodiment of the inventive systems, methods, and devices disclosed herein for use with interactive devices, such as the mobile communication device  800  of  FIGS. 8A-8C , upon selection by a user of one of the desired control inputs, a processor receives the input signal, and in response displays the associated list of secondary inputs in display area  840 . These secondary inputs may be displayed clearly identified with the key that actuates that entry, as previously described, or in devices with a touch screen, may be selected by touching the desired secondary input selection. In some embodiments, the control inputs selections remain displayed on the display screen  840 , while the secondary inputs are displayed, while in other embodiments, the control inputs and secondary inputs may be displayed sequentially. In embodiments where the control inputs and secondary inputs are displayed simultaneously, the non-selected control inputs may be displayed with reduced shading or differing color to show that they have not been selected. In still other embodiments, the non-selected control inputs may remain active, thereby allowing the user to change the set of secondary inputs simultaneously displayed. 
     Upon user selection of an entry by entering a control input followed by a secondary inputs, a signal is sent to a processor, which in turn stores the user-selected character or other symbol on a storage medium and if desired sends a signal to the display area  840  to display the selected letter, number, character, mathematical symbol, punctuation mark, or the like. In some embodiments, if the user does not select a secondary input within a predetermined time, the secondary inputs are removed from the display area  840 , and the original set of control inputs are displayed. 
     Control function keys  830  may be actuated for further processing of inputted information. Once the user has selected and entered a secondary input, the processor then removes the secondary inputs from the display area  840 , and returns the display of control inputs. There is a delay set between the entering of the desired secondary input selected and the removal of the secondary inputs form the display area  840 . During this delay, function keys  830 , such as a shift input, a punctuation input, or a space input, may be actuated to further process the entry for capitalization, punctuation, or for adding a space. In addition, for the keypad embodiment, the user may desire to have the character that is being input capitalized. In some embodiments, the user may capitalize a character by simultaneously touching the selected control input and the selected secondary input. Function keys that may be included in the for text editing and inputting include scrolling input, a select input, a tab input, a space bar input, a backspace input, and an enter input. 
     In addition to its usually function for capitalization of letters, in some embodiments, a shift key may also be used to alternate between sets of letters, numbers, characters, mathematical symbols, punctuation marks, or the like. In still other embodiments, the user may activate the numeric function of the keypad device by pressing the pound sign (#) key, which is standard on many keyboards. In other embodiments, a menu function key may be available for expanding the selection list of control inputs, secondary inputs, functions, and options that may be accessed on an interactive device, such as the mobile communication device  800  of  FIGS. 8A-8C . The display area  840  of interactive devices such as the mobile communication device  800  may display a menu, showing the control inputs, secondary inputs, functions, and options that are currently available to a user. Additionally, the user may activate different menus, giving access to an even expaned set of control inputs, secondary inputs, functions, and options. 
     A scrolling function may be used in some embodiments, where functions keys  830  are scroll or arrow keys to facilitate choosing control inputs, secondary inputs, functions, and options from the display are  840 . In such embodiments, pressing a forward arrow input or aback arrow input sends a signal to the processor, which in response moves the set control inputs, secondary inputs, functions, and options to the left or right respectively, thereby allowing the user rapid access to what is displayed. 
     Keypad  810  with keys  820 , function keys  830 , and control and secondary input keys  835  of interactive mobile device  800  of  FIGS. 8A-8C  have been used as an exemplary reduced-size input components to illustrate embodiments of inventive the systems and method. In  FIGS. 9A-9C , a PDA watch  900  is depicted as another example of an interactive device with reduced-size input components. 
     In  FIG. 9A , an embodiment of a PDA watch  900  is shown, having input buttons  910 , and function button  920 , as well a voice input or output device  930 , such as a microphone or speaker, respectively, or both, and a display screen  940 . In this embodiment, the input buttons,  910 , may be used to actuate control and secondary input selections, and function button  920  may be used for the secondary input for the vowels.  FIGS. 9B and 9C  are alternative embodiments of a PDA watch, having separate control input and secondary input keys  910  on the rim of the watch, in an horizontal arrangement ( FIG. 9B ), and alternatively, in a vertical arrangement ( FIG. 9C ). 
     As previously mentioned, for interactive devices, such as shown in  FIGS. 8A-8C , and  FIGS. 9A-9C , inputs and outputs may be displayed on a display device, such as a display screen  840 ,  940 . Such devices may have one or more display screens. As previously mentioned, the display screens are useful for two purposes. First, they may be used for viewing control inputs or secondary inputs of letters, numbers, characters, symbols, punctuation marks, commands, and the like for selection by the user. Second, they may display the text, symbols, or commands, etc. that have been inputted for further processing, such as editing, before the entering, sending, or storing the input. The interactive devices such as the mobile communication device  800 , or the PDA watch  900 , microphones and speakers, such as  850  of device  800 , or  930  of device  900 , so that input and output are communicated to the user via sound. In still other embodiments of interactive devices such as  800 ,  900 , the devices may have mechanical means, such as vibration, for communicating to the user. In this regard, though the systems, methods, and devices of the disclosed invention may be used by a variety of end-users, they are suited for assistive technologies. 
     The foregoing description of embodiments of the present disclosure has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Many modifications and variations will be apparent to the practitioner skilled in the art. The embodiments were chosen and described in order to best explain the principles of this disclosure and its practical application, thereby enabling others skilled in the art to understand various embodiments and with various modifications that are suited to the particular use contemplated. It is intended that the scope of this disclosure be defined by the following claims and its equivalence.