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.
The encoding is variable-length and uses 8-bit code units. It was designed for backward compatibility with ASCII and to avoid the complications of endianness and byte order marks in the alternative UTF-16 and UTF-32 encodings.