Cookie

1. A small cake. Probably the most popular cookie is the Chocolate Chip Cookie. There are many different versions of this. Probably the 'classic' version is the Toll House Cookie. Cookies are generally known as biscuits in the UK and Australia. A cookie cutter is a tool to make cookies in a special shape. A cookie cutter solution is a standard solution. See also Cookie Monster.

2. A handle, transaction ID, or other token of agreement between cooperating programs. "I give him a packet, he gives me back a cookie".

3. Short for HTTP cookie, a special case of 2.