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- Computer Dictionary and Glossary -

ASCII

1. Short for American Standard Code for Information Interexchange, ASCII is an industry standard, which assigns letters, numbers, and other characters within the 256 slots available in the 8-bit code.

The ASCII table is divided in 3 sections:

  • Non printable, system codes between 0 and 31.
  • Lower ASCII, between 32 and 127. This table originates from the older, American systems, which worked on 7-bit character tables.
  • Higher ASCII, between 128 and 255. This portion is programmable; characters are based on the language of your operating system or program you are using. Foreign letters are also placed in this section.

Standard or Lower ASCII characters and codes

  ascii  
   

Extended ASCII uses eight instead of seven bits, which adds 128 additional characters. This gives extended ASCII the ability for extra characters, such as special symbols, foreign language letters, and drawing characters as shown below.

Extended or Higher ASCII characters and codes

2. While in a ftp session, ascii is also a command to switch to ascii file transfer mode.

Also see: ASCII Art, ASCII printer, Character code, Codepage, EBCDIC, Programming definitions, Unicode