Haha.. just noticed that this is bringing out all us low digit Slashdot users. :)
My first was a TRS80 Model 1, learned some basic on that.
Next I moved onto using a PDP11 running RSTS at school and becoming a student sysadmin and learning Pascal and Fortran and playing TREK :) Ahh the memories of Control-G bombing people's VT52 terminals so they would make that horrible buzzer sound you could hear half way across the computer lab.
Then my first serious home computer was a Commodore-64 the first week they came out. I used that for all sorts of hacking, BBSing, dialup to school mainframes, learning Motorola assembly, learning to be a pirate and bypass copy protections etc.. huge fun that system was all the way into college.
Got a 386SX when they first became semi-affordable (1500). Used that to do DOS stuff, and started running Linux in late 1993 simply because I needed a free C-compiler environment for university homework, by dialing-up a BBS in Ohio and downloading all the floppies for Yggdrasil Linux insdtall. So, I started using Linux before it had ANY sort of gui or X support(other than MGR), and before it had TCPIP networking(unless you hacked in the KA9Q stuff originally written for hams using packet radio on different systems yourself).
Good times. Computers suck now.