Post-open systems, a select few sites are left. They have been incorporated.
Click below for everything you need to know, do, and see about mainframes and
outside of it.
The Dinosaur Myth
The reference of choice when faced with choices between one platform or another. Keep it close to hand.
Troy Coleman has created a blog to turn to when you want to talk about DB2 (and who does not?) Check it out! It's always great to have contact with the go-to man for a subject area, and Troy is your 2utor on DB2.
Step-by-step tutorial on mainframes. Probably useful for anyone.
Free IT Books
Download useful books for free. What could be better? Keep up to date and learn without cost.
OpenMainframe.org is a forum for exchanging news, views and information related to creating an open market for IBM-compatible mainframe solutions.
This site is where to go for information and discussion on alternative and open mainframe options.
CMG - Computer Measurement Group
If you do performance or capacity, this site should be bookmarked. For a small fee, you can read the entire archives, BUT anyone can read papers that are from conferences 2 years past. There is a lot of useful content out there.