What people refer to as the "famous shutter squeak" of the A series Canon Cameras is very misleading to owners who try and lubricate their camera shutters and ruin them, I asked the technician who services my cameras he told me it's nothing to do with the shutter, but is a dry bearing in the mirror braking mechanism.
Canon's first electronic camera with a C.P.U. was the EF http://www.mikegrigsby.com/html/canon_ef.html, which was I.M.O. was a much better camera than the AE1.