how to learn RPG/400
ibm-midrange, rpg
Solution
Thank you for your interest in RPG. RPG runs on an IBM i (aka AS/400, iSeries, Systemi) system. This is not a server you can easily buy on your own. The starting price is around $15,000 on up to millions. However, you can pay for access to a system or can try out the system using a free host. Check out http://www.holgerscherer.de/ for a free account. (Thanks @kratenko)
Take a look at midrange.com which is a bunch of mailing lists related to the platform. Also look at their wiki which is a decent staring point for at least seeing what the system is about. (Note: I am a moderator for the Midrange.Com's .NET mailing list).
Problem
I heard about RPG programming from my lecturer. I would like to give it a try. The problem with it is that, how I do the programming? I don't know the OS and the IDE to suit the needs. Any help?