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.
A byte consists of 8 bits and is typically used to represent a single logical character. As each of the 8 bits can contain either of two binary values (1 or 0) the total number of combinations in any byte is therefore 2*2*2*2*2*2*2*2 = 2**8 = 256. The literal character for any particular byte value can vary depending on the Code being used by the computer.