Introduction In computing, a keyboard is a typewriter-style keyboard. Despite the development of alternative input devices, such as the mouse, touchscreen, pen devices, character recognition and voice recognition, the keyboard remains the most commonly used and most versatile device used for direct (human) input into computers.
Lecturer: Mrs Pham Thi Yen Group members: To Trong Giang Nguyen Van Toan Lai Phu Kien Nguyen Van Duc Introduction History of Keyboard Keyboard Layout Future Trends Introduction In computing, a keyboard is a typewriter-style keyboard Despite the development of alternative input devices, such as the mouse, touchscreen, pen devices, character recognition and voice recognition, the keyboard remains the most commonly used and most versatile device used for direct (human) input into computers A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol However, to produce some symbols requires pressing and holding several keys simultaneously or in sequence While most keyboard keys produce letters, numbers or signs (characters), other keys or simultaneous key presses can produce actions or computer commands In normal usage, the keyboard is used to type text and numbers into a word processor, text editor or other program Keyboards are the only way to enter commands on a command-line interface History of Keyboard - In the 1860s, the inventor Christopher Sholes, a newspaper editor living in Milwaukee conceived the characters arranged on the typewriters in order of alphabet - James Densmore, a business partner with Sholes suggested separating out key characters often used to speed up typing After many changes and reorganization, QWERTY keyboard style was officially born in1870 PC QWERTRY keyboard - By 1930, the Dvorak keyboard (by August Dvorak and William Deay design) has been released, there is significant progress on typing speed Dvorak keyboard - At the time we prepare to switch to the Dvorak keyboard, the 2nd World War broke out So , every keyboard manufactured agreed standard QWERTY - Today, the QWETRY keyboard has become so familiar to us It not only for PC but also integrated for laptops, mobile phone Keyboard Layout Alphabetic: There are a number of different arrangements of alphabetic, numeric, and punctuation symbols on keys These different keyboard layouts arise mainly because different people need easy access to different symbols, either because they are inputting text in different languages, or because they need a specialized layout for mathematics, accounting, computer programming, or other purposes The United States keyboard layout is used as default in the currently most popular operating systems: Windows, Mac OS X and Linux Keyboard Layout Some different keyboard layouts: United States keyboard layout: Keyboard Layout Vietnamese keyboard layout: Keyboard Layout Czech (QWERTZ) keyboard layout: Keyboard Layout Key types: Alphanumeric: Alphanumberic include: a-z, 0-9 and punctuation symbols Many of these keys will produce different symbols when modifier keys or shift keys are pressed The alphabetic characters become uppercase when the shift key or Caps Lock key is depressed The numeric characters become symbols or punctuation marks when the shift key is depressed Keyboard Layout Modifiers: Modifier keys are special keys that modify the normal action of another key, when the two are pressed in combination For example, + in Microsoft Windows will close the program in an active window In contrast, pressing just will probably nothing, unless assigned a specific function in a particular program By themselves, modifier keys usually nothing Keyboard Layout Navigation and typing modes: Navigation and typing modes keys include: Arrow key, Page Up and Page Down, Home, End, Tab, Insert, Delete, Backspace key and Lock keys (Num lock, Caps lock, Scroll lock) System commands: System commands keys include: Print screen (used to capture the entire screen), Pause/Break (used (in conjunction with Ctrl) to pause/stop program execution or display system properties with combination Windows key + Pause/Break), Escape (a shortcut in dialog boxes for No, Quit, Exit, Cancel, or Abort, back out of a mistaken command) and Menu key (used to launch a context menu instead of right mouse button) Future Trends We think, in the future, keyboard can develop in two main directions Firstly, that is more and more popular of the virtual keyboard as : -Touch keyboard : This is this is the kind of keyboard for touch screen, smartphone, tablet… - - Laser keyboard: This is a new keyboard that appears, use optical technology to identify Second, in a near future, the keyboard may ceased to exist People will interact with the device through the audio signal or my thought References Wikipedia (wikipedia.org) Thank you for listening ... Keyboard Layout Some different keyboard layouts: United States keyboard layout: Keyboard Layout Vietnamese keyboard layout: Keyboard Layout Czech (QWERTZ) keyboard layout: Keyboard Layout Key types:... speed Dvorak keyboard - At the time we prepare to switch to the Dvorak keyboard, the 2nd World War broke out So , every keyboard manufactured agreed standard QWERTY - Today, the QWETRY keyboard has... Introduction History of Keyboard Keyboard Layout Future Trends Introduction In computing, a keyboard is a typewriter-style keyboard Despite the development of alternative