I've actually owned and used Microsoft WIndows 286... never heard of it? Most people haven't. It predated windows 3.0 by several years.
I've been dinking around with computers since Before Bill Gates released MS/DOS into the Commercial world a touch over 30 years now... and Before IBM created the first PC. Now.
Used to work on and with DEC VAX 11/785 mini mainframes 20+ years ago.
I've actually used a Commodore CBM in College to learn programing on. Before the IBM-PC displaced it in the workplace.
OLD-COMPUTERS.COM : The Museum
I guess that dates me...