If you'd like to try, there is a way to get a free user account at pub400.com. That got me interested enough that I set out to get my own AS/400.
It took me literally years until I stumbled upon an affordable machine with licenses. The machine I got is decades old and was decommissioned in 2008, after a long life.
IBM created something revolutionary and did everything to keep the public away from it.
Some people feel at home with APL (A Programming Language) or its descendants. It was first developed by Ken Iverson as a notation to be used on paper for communicating procedures and algorithms. It was the subject of a book published in 1962, then became a programming language running on IBM mainframes in 1966.
The following line of code produces all the prime numbers below the value R.
It took me literally years until I stumbled upon an affordable machine with licenses. The machine I got is decades old and was decommissioned in 2008, after a long life.
IBM created something revolutionary and did everything to keep the public away from it.