Siemens Nixendorf Scenic Mobile 300, 133 MHz Pentium (before we had to number them), 16 MB of RAM, 800×600 passive matrix LCD, released 1997. I caused a major scandal at my high school since nobody on the staff had ever contemplated the scenario whereby a student turned up with a computer of their own. I dual booted Windows NT 4.0 and Linux (2.2 kernel I think).

Oh, the simple things in life!