TechTalk: A web based system for mathematical collaboration TechTalk is a collaborative, archiving system which allows individuals and groups to interact and communicate in a shared workspace that provides Matlab and Maple servers. Multiple users can share multiple mathematical servers, chain computations on different servers, talk to each other and record and replay sessions etc. Security via authentication and authorization is provided, and each participant can enter commands and see results (including graphics) in various chat, Matlab, and Maple windows. Maple and Matlab results can be sent directly between the servers, and a logging facility allows replaying of a session or selected parts – including broadcasting of class lessons/notes in an electronic tutorial setting