<\body> is a computer algebra system for the manipulation of what could loosely be called . It is aimed at, though not necessarily restricted to, theoretical high-energy physicists. Because of its target audience, the program's interface, storage system and underlying philosophy differ substantially from other computer algebra systems. Cadabra is developed by |http://www.aei.mpg.de/~peekas/> and distributed under the GPL license. <\initial> <\collection>