Whats you oldest computer

I'm not sure which is older, my Apple //e or my PDP11/53 turned 11/73. I have an IBM AT, but that is currently disassembled, and I'm don't plan on keeping it. I suppose my Apple is the oldest since it is has the painted case with white keyboard characters. All 3 of the computers I mentioned were built for quite awhile, so I could be wrong. I guess the best I can say is early to mid 80's. I've never really gone for wanting the oldest with computers. I got started with oldeer computers because they were cheap. I got a PC and an XT with monitors and keyboards for $35, and then I got a Unisys 286 for free. I of course started working with the Apple //e at school, so I wanted one for home. I didn't get one until the late 90s, However. I wouldn't know what to do with anything like a PDP8. I don't even really know what to do with my 11 yet. Anybody know off hand what year the MicroVax 3400 was released? Chad Fernandez Michigan, USA of you oldest