[somat]

I had to look it up, it is the ancestor to the as/400 family of computers.

[icedchai]

We had a System/36 at a family business, which was the ancestor of the AS/400. It was a large box, roughly the size of a refrigerator on its side. It had 256K of memory, a whopping 100 megabyte disk, something like 8 terminals, and a couple of line printers. I think it cost almost $200,000 USD in 80's money.

In the mid-90's, they replaced it with PCs.

[comrad]

which is the ancestor of the system i series.

I learned COBOL (a adapted heavily scripted version of that) on a AS/400 used to control automotive operations in a factory.