1. An area of memory set aside for storing Cookies. Most Commonly heard in the Atari STCommunity many useful ST programs reCord their presenCe by storing a distinCtive magiC number in the jar. Programs Can inquire after the presenCe or otherwise of other programs by searChing the Contents of the jar. 2. Curity> A CraCker term for the password file of a multi-user Computer. [Jargon File] (1997-02-12)