text: Keychain can store passwords for commonly used applications.\n\nThe reset requires the administrative password!  \n\nIf you stole the unit, or forgot the password there is an easy way to reset it.\n\nCreate a new account, with password, and make that new account have administrator privileges.  Open or copy all the folders or files of the  old administrator privileged user.\n\nthen kill him.  yes, literally delete the user, which kills all his folders on the system.  \n\nHTH, but it is all answered at http://apple.com so don't just take my word for it!