Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!elroy.jpl.nasa.gov!usc!ucselx!maxc1553
From: maxc1553@ucselx.sdsu.edu (Generic Account 1553)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: IBM models/configurations.
Message-ID: <1991Feb11.205439.3312@ucselx.sdsu.edu>
Date: 11 Feb 91 20:54:39 GMT
Organization: San Diego State University Computing Services
Lines: 9

How many IBM systems are there?  I'm completely confused... 

Please help me on these systems:   PS2, OS2, DOS(versions?), AT, PC, etc.

Honestly, I need a complete introduction to this machine.  
All I know about this popular machine is some DOS commands.. dir.. copy..cd.
I do have some experiences in UNIX, Amiga, Apple's BASIC.

Thanks for any and all helps!!!