AS400

You probably need to invest in a good book or a training class, but here are a few reference sites that may help:

http://www.geocities.com/itpweb1/400/

http://faq.midrange.com/data/cache/1.html

http://www.iseriesnetwork.com/Resources/ClubTech/TNT400/best_of_as400_newsgroups.htm

Delete any spaces in the URLs...hope they help!
Good luck.

Since you didn't state what operating system that you were using on the AS/400, my guess would be OS/400. You can find infomation on IBM's web site. This link will get you close:

http://publib.boulder.ibm.com/iseries/v5r2/ic2924/index.htm

It's for the IBM online publications library.

Hope this helps.