Slackware version 8. I used several others after my first install. I found it difficult to understand at first.

I used Mandrake, then Mandriva for several years. When Mandy died, I came back to Slack. I understand it now, so I don't expect I will be changing any time soon.

Madrake 8.2. back in 2002. IIRC I bought the box set at Borders. They're both gone now.

Debian & Slackware...was deciding which one to use.

SLS with kernal 0.16 in 1993

My first contact with Linux was UHU Linux preinstalled on my new PC in 2006, but I was a kid and I couldn't live without my games so I changed it for WinXP. I came back to the world of Linux in 2010 and the first distro which was installed by myself was Ubuntu (IIRC).

A few years ago, I first used Ubuntu 12.04.

Mandrake 7.0 which came on the free CD supplied with the May 2000 edition of PC plus. (still got the CD! Sheesh!)

I stuck with Mandrake for quite a while till it eventually changed to Mandriva. Moved over to Ubuntu 6.06 in 2006 while also spending six months or so on and off installing Gentoo 2006 on an old Sun Microsystem Ultra 2 running a couple of 300Mhz UltraSparc II processors. A brilliant way to learn a bit of Linux "Under-the-Hood" stuff. You soon learn when you've spent 12 hours plus compiling the kernel to then find out on the first reboot that you forgot to include the damn SCSI controller in the configuration!

Play Bonny!

It was Fedora Core 4. After that there was a long period of distro hopping (Debian, Centos, Slackware, openSuse, Arch, FreeBSD, Ubuntu, Mint) until I got comfortable with Slackware.

My First distro was Slackware.

Now I alternate between Fedora and Ubuntu on the desktop.

Ofcourse my first was Ubuntu 9.10. Now I am having LM18.1,MXLinux16,PCLinuxOS

First one used seriously, over a long time and as main system was Mandrake 9.1. Followed by Fedora Core 4. Several Fedora versions, then Gentoo since summer 2008.

I started out with RedHat back in the 90's when it was still free. Version 2.1 I believe was my first.

Linux Mandrake, between the 90s and 2000s

Linux Knoppix maybe

My very first distro was Linux Mint 17.2/17.3 but it was for a very brief period. The first distro I became comfortable with and used for awhile was Lubuntu 14.04 and after some months of learning Ubuntu, I have been distro hopping ever since.