| |
| | Bits, Bytes, and Character Sets |
 | | On a typewriter, the character set was limited by the number of typing keys: about forty-five keys, with the number of characters doubled by using the shift key. |
 | | On a computer, with more keys on the board and more combining keys added to the lowly shift, the number of characters in a set is limited not by the keys but by mathematics. |
 | | The ASCII set that's most commonly used has 128 characters (actually, several of the "characters" are invisible, for things like tabs and line breaks and spaces); the common ANSI set adds another 128 characters, mostly letters with diacriticals used in European languages, for a total of 256. |
| www.nyu.edu /its/pubs/connect/archives/96fall/fredericksondensity.html (912 words) |
|