The Bitcoin Forum was created by HDH Satoshi Nakamoto on 5 April 2007 on Simple Machine Forum. He created two Bitcoin Forums. He also created more than 30  accounts including 'satoshi' and  'sirius'. the first account is 'admin' second account was his real name but then he chosed to create the third account 'satoshi' which he used to launch the Bitcoin Talk Forum. If you need further information search and you will find it.