This is clearly written from a windows users point of view, and is mildly simplistic, but it is not a bad article

http://searchwinit.techtarget.com/tip/0,289483,sid1_gci1264223,00.html?track=NL-118&ad=596213&asrc=EM_NLN_1822926&uid=6232170

Bryan O'Neal
Cornerstone Homes & Development, Inc.
4220 E. McDowell Rd Ste. #108
Mesa, AZ 85215
(480) 505-1900