Monday, June 10, 2013

Family tree of the IBM i

This year marks the 25th anniversary of the launch of the AS400.

How much has changed since I first encountered a B50, and started learning RPG III.

How many of you worked with the B models?

Family tree of the IBM i
Click to see larger image.

Angus the IT Chap posted three images showing the evoluton of the IBM i on his blog, which you can see here»

The story of how the AS400 got its name is given in a book authored by John Sears. It was originally going to be called the Application System/40, or AS/40. IBM's PC development team complained about the name. They had just developed the PS/2, and if the midrange group was to take the double digit numbers they would be restricted to just ten models, PS/0 - PS/9. Therefore, IBM's management decided that the PCs could have the range of numbers 0-99, midranges 100-999, and mainframes would have the range 1000-9999. Thus the AS/40 became the AS400.

I remember the PS/2 and the PS/1, which came after the PS/2. Were there any other PSs?

1 comment:

  1. Interesting that u had travelled the journey since beginning .. Wow


To prevent "comment spam" all comments are moderated.
Learn about this website's comments policy here.

Some people have reported that they cannot post a comment using certain computers and browsers. If this is you feel free to use the Contact Form to send me the comment and I will post it for you, please include the title of the post so I know which one to post the comment to.