OIT has A/V equipment available for rental and can also provide audio-visual support for Princeton classes and University events. You can find more information at http://www.princeton.edu/mediaservices/.
The CS department does have a digital camera, video camera, and a portable projector available for CS related classes and events. Please contact email@example.com for more information.
CS Staff maintains the projectors in Rooms 105, 301, 302, 331, 401, 402, and 431 of the Computer Science Building. For issues with equipment in other rooms (e.g., CS 101, CS 104, or in the Friend Center) please contact Media Services. (You are welcome to ask CS Staff, but our ability to troubleshoot or address any problems in these rooms is extremely limited.)