What was the first OS you ever used?

MS Dos as far as I can remember. I consider myself as really fortunate, as it helped me with algorithms, instruction etc.
Command line is still relevant no matter the OS you are using.
 
I have been using linux ever since I first played supertux on a ubuntu 16.04 machine (I think)
 
I vaguely remember using Windows 3.1 for a bit when I was little.

Windows 95 is the one I really grew up with, though.
 
First OS was probably TSS/8 on a Dec PDP-8 at CMU. At the same time, the comp sci 101 class was using TSS/360 on the 360 model 67 for classwork; WATFIV (a Fortran variant) on cards. After a couple years, I managed access to the Univac 1108 running Exec-8; that was a fantastic machine from the hardware standpoint. (and the only ones-compliment hardware I've ever worked on).

As for home computing, the Commodore 128 came many years later; next an Apple Performa 6001 with the PowerPC 601 CPU.

Most of my OS'es since then have been Unix based: SunOS / Solaris, then Linux. I had a brief tussle with Windows around 2008/2009 (I think it was Windows 7 then); fortunately my office is and has been a windows free zone for over a decade now.
 
Windows 95 S.E with USB Support....that was a big deal!...but Windows XP and Windows 7 were the best experiences, at least they allowed you to turn off the pesky Windows Updates.
Windows 95 S.E with USB Support....that was a big deal!...but Windows XP and Windows 7 were the best experiences, at least they allowed you to turn off the pesky Windows Updates.
I never heard of 95SE?
 
My introduction to computer, it was a version of MSDOS on my elementary school labs.
my very own computer? it was system 7.5 on a mac LC 475 from my dad who just upgraded his own mac to a powermac
 
"Reality" a PICK-OS running on a Microdata 1600 (1980) followed by
RT11 running on Digital Equipment Corp PDP11/02 (1984) Followed by
TSX+ running on DEC PDP11/23 (1987)
MS-DOS (1987)
WIN3.1
WIN-NT
OS/2
WIN/XP (~200x)
WIN-7, OSX, Linux, exc...
WIN-10
 
Sinclair BASIC, circa 1982. If you asked which one was the best: Windows 2000. It had all the features of a workstation OS, but all the flexibility of a consumer OS.
 
If I remember correctly, the first computer I ever used was an iMac G3, I believe it was for school when I was in 2nd Grade, I think. Then the first windows PC I ever used was Windows 98? Damn. First actual PC I owned was a Windows Vista laptop.
 
My first computer was Tandy 1000 HX with 256kb ram, and 64kb eeprom that stored DOS 2.11 as a "C:" drive.
It booted instantly. but only had 720kb 3.5" floppy drive.

I've also used used Dos 3.0, 3.3, 4, 5, 6, Windows 3.0, 3.1, 3.11 for workgroups, 95, 98, 2000, XP, XP 64bit, etc etc.

 
My first OS I used was on a TRS-80 Model 3 LDOS

My first x86 OS was Dos 3.30. It was on our Leading Edge 8088 running at 8mhz. 512mb ram, 50mb hard drive that had to be partitioned into two drives because DOS 3.30 only supported 30mb drive partitions.
 
CP/M. On a system I put together myself (as one had to, way back) comprising a box with power supply and S-100 bus, a CPU card with a mighty, all-powerful 4 MHz Z80 CPU, a memory card with a massive 64 kbytes of dynamic RAM, a single floppy disc drive with its interface card and a “communications” interface card with two RS-232 (serial) ports (one for my fifth-hand terminal) and one Centronics (parallel) port for an Epson dot matrix printer that came later when I had the cash.
 
First computer was a hand me down in the early 90's. It ran DOS 5.0 on a Wyse PC that had a 8088 CPU and 21MB hard drive and monochrome 13" monitor. DOS booted up from a 5.25" floppy disk. I don't remember the ram of that PC but it probably wasn't much.

Later I got a brand new 486DX2-66 with 420MB hard drive and 8mb of SIMM memory. That had DOS 6.2 and ran Windows 3.1. Good times but I remember that old PC costed $2600 in 1994. I wish I had bought $2600 worth of Apple stock back then.

 
CP/M users are virtually a dying breed. My first operating system also and I'm heading for 81. Also, a Z80 system but I had to choose between 64 kB or a 2nd 8-inch floppy drive. I settled on 48kB and 2 drives. CP/M kicked off in 1974. It sure taught you to create tight assembler code and CP/M had enough functionality to produce and maintain
Of course, there were many very competent Mini operating systems on the market in that era (which I used) including vendors like DEC, General Automation, Data General, Honeywell and HP. All those systems have vanished into the mist of time, overwhelmed by X86 and failure to innovate.
 
I never heard of 95SE?
Windows 7 Pro has been and still is the best operating system Microsoft ever got lucky enough to build! I still have my Acer laptop with Windows 7 Pro on it. Neither one, the Acer nor Windows 7 Pro ever gave me any trouble, to this day! It's still running, (15yrs old in November 2026) albeit a bil slower.
 
Back