Open source computer algebra systems

This survey will look at Axiom, a free and very powerful computer algebra system available. It is a general purpose CAS useful for symbolic computation, research, and the development of new mathematical algorithms. Axiom is similar in some ways to Maxima, covered in the survey [J1], but different in many ways as well. Axiom, Maxima, and SAGE [S], are the largest of the general-purpose open-source CAS's. If you want to "take a test drive," Axiom can be tested without installation via the web interface [AS] or the SAGE online interface [S].