SAM definition by Webster's New World
SAM definition by American Heritage Dictionary
sam - Computer Definition
(2) (Security Accounts Manager) The part of Windows that manages the database of usernames, passwords and permissions. A SAM resides in each server as well as in each domain controller. See PDC and trust relationship.
(3) (Symantec AntiVirus for Macintosh) An earlier Macintosh antivirus program from Symantec Corporation, Cupertino, CA. It evolved into Norton AntiVirus for Mac.