Windows 98, it was awesome! Plus I had a HUGE 4GB HD! WOW!

windows 3.1 with a 485 mb hard drive lol

MS-DOS and Windows for Workgroups, Windows 3.11 in school (around 1995).
Windows 95 4.00.950a on my home desktop but in 1997.
Windows NT Server 4.0 in a cybercafe around the same time (1997)
Windows Vista was my first legit Windows.
Windows XP is the first I sleep with.

What? Really?

win98 > XP > longhorn 4074 > vista sp1 > win7 7000 > win7 7068 > win7 7100 >win7 7260 > .
and currently i back to XP because xp is fastest for my comp.

The first OS I ever used was Win95, although I can't remember which version. He he.. at that time, I knew nothing about using a PC. When I wanted to play, I asked dad to power the PC for me.

Win95 or Win98... I was only 3 when I used computer first time.

My first operating system was either Mac OS 7 or 8 (I forget) on a hand-me-down computer. I'm going to boot it back up one of these days. Hopefully, the hard drive isn't dead.

The first OS I used was Windows 3.1, and I generally liked it. The Windows Entertainement Packs installed on it, and I was most of the times playing games. I also learned how to use Word/Office/Powerpoint on it.

I think it was Commodore builtin os, or Windows 98.

Does the spectrum OS count? if not DOS3, and if not, win 3.11 for workgroups.

I have used some DOS, but never really got into using windows 100% until 95 came out.

My first computer experience was playing Star Trek on a terminal connected to a mainframe back in 1979. It was a great game!

Still, I generally avoided computers after that. In the mid 1980s my family got an IBM PC running DOS, and I never touched it. In college all my professors were using Macs, but I was still rather anti-computer (I was a physics major, math minor, and didn't see where computers provided any help beyond typing).

All that changed one day in 1989 while reading an issue of Physics Today. I came across an add for an application that did math the way it was normally written (rather than having to translate it into some cryptic code). The application was called Theorist and only ran on Macs. I've been using Macs (and Theorist) ever since.

I later got experience with NeXT, SGI and Suns when I got a position at the National Science Foundation's Geometry Center. That pretty much set my platforms of choice since.

I used a commodore based OS, and one called ION I think it was called that but the most distinguishing feature was the keyboard with the trackball mouse built into the keyboard.

Macintosh System 4.x, or maybe 3.x, I was too young to look up the version, and I don't have those exact floppies anymore

The first operating system I knowingly used was System 4.0 on a Mac Plus in school.

The first *real* operating system was AIX 4.1.5 on a Motorola PowerStack

Windows 3.11 is the one I remember most because I used it heavily on my very first PC at the age of 12. Before that, I vaguely remember using either Windows 2.0 or 3.0 on my dad's computer.

Whatever OS ran on a Commodore64.. I didn't even have a floppy, I had to run my games off a tape drive, LOL. Sucked when it got unplugged accidentally and everything was lost.

I can beat that somehow: at work we are using some quite old computers ('97 vintage) in the plant floor, I recently retired two running various flavours of 95 but the last one is still on (because of a specialized ISA card) and it is still running 4.0.950!

By the way, I am more impressed by someone running 3.1 in 2000 than 95 in 2006!

Ah, and to be back on thread, I cannot remember its name or even if it qualifies as an operating system: it was the BASIC-derived system which drove the HP9825A (http://www.hp9825.com/html/9825.html) that the maths professor let us play with (officially it was named "introduction to computers" ) during lunchtime.

Wasn't basic fun? Took forever to do anything with it and god forbid you put a ? in the wrong place or something LOL.

Mine was a good old P2 running Windows 98. I remember it crashing when I ran a game made for NT5/2000.
Ah, good old times =)

Microsoft DOS 5.0 (With 45k of free memory at least) and Windows 3.11 For Workgroups

And what about someone who continued using Windows 3.11 until 2004-5? I never had any need to upgrade, so when I got a new machine in 2004 or 2005, it was replacing a first-generation MMX Pentium that had about 64 meg of core and a couple of 500 meg hards. By the time I finally got rid, it was creaking, but it really did work. I even had true colour on it as some point.

My first OS I used is Windows 98 First Edition.