Monday poll: first computer system you used

By popular request, a new poll is up: What was the first computer system you used? As usual, it's hard to list everything, so use the comments section if your first system isn't on the list. Use the comments as well to describe the context of the happy memories from those (probably) simpler times.

And yes, it's a multiple choice poll this time, so you can only choose one, even if you used your VIC-20 to hack into a DataGeneral mini from which you launched DOS attacks on the school mainframe, or whatever.