TCP/IP - TCP/IP establishes a connection between two hosts so that they can send messages back and forth for a period of time.
Top Level Domain - The unique name used to identify an internet site. For example: yutrend.com, or yourname.com.
Traffic - Traffic shows number of visits or impressions which belongs to one or to group of sites.
T-Rex - Robot (spider) of Lycos, one of the major search engines.
Two-Tier Program - A program where an affiliate recruits other affiliates for an advertiser and is paid a percentage of the recruited affiliate's sales or earnings.