Davidson, Shelby J. (born: 1868 - died: 1931) Born in Lexington, Davidson became a lawyer. He invented a paper rewinding device for a tabulating machine and an adding machine attachment for automatically adding in set amounts. Shelby Davidson's Papers are at Howard University. For more see World of Invention. History's most significant inventions and the people behind them, 2nd ed., by K. A. McGrath and B. Travers.
Unicode can be implemented by different character encodings. The most commonly used encodings are UTF-8, UTF-16 and the now-obsolete UCS-2. UTF-8 uses one byte for any ASCII character, all of which have the same code values in both UTF-8 and ASCII encoding, and up to four bytes for other characters.
All the characters used in email messages are ASCII characters and so are all the characters used in HTML documents. An ASCII file is a data or text file that contains only characters coded from the standard ASCII character set. Characters 0 through 127 comprise the Standard ASCII Set and characters 128 to 255 are considered to be in the Extended ASCII Set. These codes, however, may not be the same in all computers and files containing these characters may not display or convert properly by another ASCII program.