Larry Ellison - Fortune - Billionaire list

Larry Ellison
Lawrence Joseph Ellison (born August 17, 1944) is the founder and CEO of the major database software firm Oracle Corporation.

Fortune
$18.4 billion.

How Larry Ellison got Rich
He had an early aptitude for mathematics, and worked as a young man for Ampex Corporation. One of his projects was a database for the CIA, which he named "Oracle".

Ellison was inspired by the paper written by Edgar F. Codd on relational database systems named A Relational Model of Data for Large Shared Data Banks. He founded Oracle in 1977, putting up $2000 of his own money, under the name Software Development Laboratories. In 1979 the company was renamed Relational Software Inc., later to be renamed Oracle after the flagship product Oracle database. He had heard about the IBM System R database, also based on Codd's theories, and wanted Oracle to be compatible with it, but IBM stopped this by keeping the error codes for their DBMS secret. The initial release of Oracle was Oracle 2, even though there was no Oracle 1. The release number was intended to imply that all of the bugs had been worked out of an earlier version.

Ellison is reported to be one of the richest people in America by Forbes. In 2004, Forbes reported that Ellison has a net worth of around $13.7 billion, making him the tenth richest man in the America.