A through Z comprise the alphabetic characters on a keyboard. These are the standard letters used in language. Alphanumeric refers to the letters and numbers on a computer keyboard.
There are a variety of character sets available for computer keyboards, depending on the region in which they will be sold. Most people are familiar with the typical U.S. keyboard layout, which includes the 26 letters of the English alphabet and the digits 0 through 1 in a QWERTY format. Some variants of this keyboard layout have a number pad to the right of the alphabetic keys, similar to the layout of desktop calculators. Local letters and alphabets are taken into consideration while designing keyboards for Asia and other non-Latin-based regions.
Other keys on a keyboard have varying functions based on the operating system being used. The function keys designated F1, F2, F3, etc. can be utilised as shortcuts within a programme by a software developer or by the operating system itself. To close a window using a standard function key combination in the Windows operating system, press the Alt and F4 keys simultaneously.