...machines shared the expensive resources on the mainframe efficiently. Then in the 1990s, a revolution happened. Smallerservers based on processors using Intel's x86 instruction set popped up everywhere. They were fast and cheap enough...
http://news.zdnet.com/2424-9595_22-222741.html
...rack servers. You can deploy powerful RISC servers based on the IBM® POWER™ architecture or even host hundreds of smallerservers on a single mainframe. IBM storage systems support all of these types of servers, providing shared access to...
http://www.findwhitepapers.com/whitepaper2069/