Clone

1. Computer, hardware device, or software program that is made to be similar to an existing device or technology. A cloned product is almost always made by a third-party company and not the company that originally designed it. For example, today most IBM compatible computers are considered clones as they are a clones of IBM's products. The first IBM clone was the Compaq Portable.
2. When referring to chat, a clone is a single user with multiple sessions logged on but under different names.

Also see: Chat definitions, Closed Architecture, PostScript clone