Stock Category breakdown : Sector > Industry > Stock, is there one ?

[Ian McVicar <icm63@xxxxxxxxxxx>]

HI, 

Is the a reliable source of information where one can get the standard list
breakdown of USA groups of Stocks accross all exchanges AMEX, NYSE, NASD. 

Like SECTORS, to INDUSTRY GROUPS to the Stock.

Eg 
SECTOR : Airlines
INDUSTRY : North Airlines, South Airlines, MidWest Airlines
STOCKS : CAL, Etc

I have been using this web site (http://www2.barchart.com/default.asp), but I
thought there may be a better source out there , any ideas ?

Thx in advance

Ian McV

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