http://www.eweek.com/article2/0,1895,1633147,00.asp

http://www.eweek.com/article2/0,1895,1633016,00.asp

http://www.eweek.com/article2/0,1895,1633000,00.asp

http://www.eweek.com/article2/0,1895,1633025,00.asp

http://www.baselinemag.com/article2/0,3959,1522378,00.asp

http://www.kiomag.com/onequestionma04

http://www.ncr.com/en/products/hardware/sa_selfchk.htm