Apple ProDOS yo! Then System 6 and on.

First Linux was a Debian disto packaged with Linux for Dummies somewhere in the late 90s/early 00s.

My first OS was whatever ran on a Commodore 64. I guess the Commodore kernel and Basic?

My first distro was whatever version of Fedora was current in the fall of 2008. I'd gone to university that year and my laptop crapped out. Couldn't afford a legit Windows license at the time to replace it, and I'm pretty sure I just remembered that Red Hat was a thing and found Fedora that way. One thumb drive and 16 years later, still using linux, so I guess that was about the only good thing to come from my abortive first attempt at higher education.

DR-DOS

Mac OS 7. By the mid-2000s, I adopted Arch Linux after looking into some other Linux distributions.

First OS: DOS 4.something on dad's PCXT clone.

First Linux: Kurumin Linux

Apple DOS Edit: Apple ProDOS
First Linux, I'm not sure anymore. Whatever was prevalent in the mid 2000s.

It was a Lisa. Those were good times.

On my first PC it was DOS 2.0, but before that I had a Vic-20, then a Commodore 64.

First OS on a computer I personally owned? Windows 98. First Linux distro was Source Mage.

If not counting ownership, then Apple IIs at school and then slightly later my family got an Amstrad that was primarily a DOS machine, but could also boot (by switching floppies several times) to some sort of GUI.

DOS - Win3.1 - Win95/98 - BeOS - Red Hat Linux - WinXP - Mac OS X - WinVista/7/8 - MacOS X - Win10 - Debian Linux (and staying with it).

My first Linux distro was Ubuntu 5.04 that I got from a free magazine cd from my university.

C64 Basic, Yggdrasil Linux. I wanted to install Minix, in the pre-Linux times, but it was beyond my abilities

School: if it wasn’t a Macintosh Plus it was something like it. We were given very little time with it and had to go to a special computer room to use them so I don’t remember a lot of specifics about it, beyond the school tech guy having to painstakingly load each program we wanted to use manually from a floppy

Home: Windows 3.1. I don’t think we got the internet until Windows 95, though

My first OS was most likely DR DOS 3.41

For my daily driver desktop PCs that was followed by

• MS-DOS 5.0
• Windows 3.11
• Windows 98 SE
• Windows XP
• Windows 7
• Windows 10

On the linux side, I got started with Gentoo, experimented with several lightweight distributions for an old laptop and had a Mint VM for a few years. These days I run Ubuntu on a couple of servers and in WSL. Never got around to using it as my main desktop OS.

For university I had (in order) an iBook G3, a MacBook and a MacBook Pro, so you can add most of macOS 10.x to that list.

On the Linux side: Crunchbang Linux when it was running Debian

I tried Microsoft Windows & Apple OS X before that, but that is is now behind me… as is Debian & Arch being a NixOS user for the last few years.

First OS: TRSDOS 1.3

First Linux distro: Slackware 4

First OS was DOS (I think) on an Apple IIE at school. I think there were a few Commodore 64’s there as well. A couple years later we got our first home computer running Windows 95. Good times playing Doom, Jane’s Apache, an MS Flight Simulator.

My first personal computer was running Windows XP and I switched to Ubuntu sometime in 2004. Ran Ubuntu for the most part till a few months ago when I switched my desktop and laptop to NixOS.

Started self hosting services in 2012 and started with Ubuntu as base OS. Now though most of my servers are Proxmox with the VMs usually running Ubuntu LTS, though NixOS is starting to creep in there as well.

First linux distro was Ubuntu but I used it in VM but the actual daily driver was Archlinux. I think Windows XP was the first OS which i used on computer(In home sure but in school maybe it was Windows 97?)

MS DOS 2.11.

Ubuntu Feisty Fawn. 2007. I was looking for new and exotic ways to avoid writing papers.

TOS

Technically (but only very technically as we basically never used them and they were obsolete at the time already) it would have been a version of Acorn MOS but realistically it was Windows 3.1.

Commodore64 for first OS, taught myself to type and then taught myself BASIC on that beast.

I honestly do not know what my first Linus distro was, whatever was on the machines in the CS half of the computer lab in college. First one I installed myself was Ubuntu, but I abandoned it almost immediately in favor of another distro that I also don't remember.

Amiga back when you booted off floppies.

Then I guess ms-dos for pc.

For Linux I got a box set for redhat from compusa in 99 and learned from there.

Well, this sets a new level of recent here judging by the comments.

Desktop OS: Linux Mint 20 MATE. Yep, that's right. I only got my first proper computer in 2020.
Thankfully, I had to install the OS myself, which was of course preceded by choosing an OS.
I had Windows 10 on that laptop for 2 days which served me to compare different OSs and burn the install DVD. I had no flash drives, and just dug out one old DVD-RW. OK, I'll be honest, hearing about Linux first I was searching for "just Linux", pure Linux, not derivatives. Oh well, GNU+Linux copypasta actually being helpful.

Alright, but why did I "have" to install an OS if I got it with Windows? It was used. I did reset it, but even though it was my first proper PC, I had no lack of paranoia. I thought that someone before me could have put spyware on that.
And I was right. Not the way I thought, but I was. That someone was Microsoft.

Atari 800 basic.

Gentoo was the first distro I used for any significant amount of time (college).

First OS windows 95 First linux distro ubuntu Currently manjaro, windows 11, macos

Probably some version of DOS, I can't remember. First Linux distro was Fedora Core 4.

First os: technically the Wii's os and android

First Linux: Ubuntu 16.04 (I remember it like it was yesterday 🥲)

Personal computer? Windows 3, I believe, but worked on computer earlier than that by a couple of years - I'm not sure what OS, it was maintained by this old guy named, no kidding, Mr. Fox. Had a rudimentary spreadsheet program.

Windows 95, Knoppix and Mandrake Linux.

First social media post that's ever made me feel young! Earliest I remember was Windows 95, but I didn't do much besides play with MS Paint.

Windows 98. Later the first Linux distro I tried was Mandrake Linux but I didn't really get into it until later with Crunchbang.

First OS: I think it was Windows 98. I have then gone through XP, Vista, 7 and staying at 10 for as long as i can.

First Linux distro: Ubuntu 10.04 or 10.10 don't remember clearly but it certainly was before GNOME 3 and in a VM. From then i have also run Fedora, Debian and most recently Linux Mint and Pop! OS in VMs as well. Maybe one day i finally set up a dual boot...

My first OS was Windows 98.

Linux distro was Ubuntu 6.0.

The first OS I recall using is Windows 7 (yes I’m young), and for Linux, I switched from Windows 11 to Linux Mint, which is what I use in the present day.

Knoppix 3.something

It was ages ago.

I had a Debian PC for a while, it was more of a project. IT work still revolved around Windows back then. Later I discovered Puppy Linux and ran that on a live USB. I encrypted the hard drive in my work laptop and never had to worry about anything making from the USB to my work data. Not a bad way to live, only had to carry around one laptop when I traveled for work.

Slackware 1.0, dann S.u.S.E