You know, an ocean away is actually something like 6 hours of flight time, vs say 6 months under see?? . I'll take an airplane anytime. Not too keen on submarines, if only they had windows (to look out of, not the microsoft ones :P ). Think about it. If something went wrong on an airplane, the only way you can go is down, but you can always attempt a survivable crash landing. In a submarine, you also go down, but to the bottom of the see. Just kidding, anyway, I'm drifting off topic here
I also have fond memories of my first computer, although a newer version than the ones mentioned. It was an IBM XT compatible, with an intel 8088 CPU 64KB of RAM (not sure though), no hard disk and 5 1/4 inch floppy drive. Can't remember what operating system it used though, I was kind of youg back then (must have been about 8 years old).
Remember the future?, That'd today, as you imagined it yesterday.