keyboard: Different types of Keys

keyboard is one of the primary input devices of the Computer. It is composed of buttons that create letters, numbers, and symbols, as well as perform other functions.

In normal usage, the keyboard is used as a text entry interface for typing text and numbers into a word processor, text editor or any other program. In a modern computer, the interpretation of key presses is generally left to the software. A computer keyboard distinguishes each physical key from every other key and reports all key presses to the controlling software. Keyboards are also used for computer gaming — either regular keyboards or keyboards with special gaming features, which can expedite frequently used keystroke combinations.

A keyboard is also used to give commands to the operating system of a computer, such as Windows’ Control-Alt-Delete combination.

Types of Keywords

Keyboard

  • Function Keys:  The function keys are used to perform specific tasks. They are labeled as F1, F2, and up to F12. The functionality of these keys differs from program to program.
  • Alphanumeric Keyboard Keys: Every keyboard contains a set of keys known as the alphanumeric keys. The term “alphanumeric” refers to either letters or numbers, but not symbols or command keys. The number keys located directly above the letters double as symbol keys. Pressing shift and holding down a number will type whatever symbol is also on that number key. The letter keys are set up the same way from keyboard to keyboard. On the top row, the letters “Q,W,E,R,T and Y” are lined up. For this reason, this common layout is often called QWERTY.
  • Control keys: These keys are used alone or in combination with other keys to perform certain actions. The most frequently used control keys are Ctrl, Alt, the Windows logo key , and Esc.
  • Navigation keys: These keys are used for moving around in documents or web pages and editing text. They include the arrow keys, Home, End, Page Up, Page Down, Delete, and Insert.

control keys