Investing Resources–Company lists for NYSE and NASDAQ

NYSE (New York Stock Exchange) complete list of stocks
http://www.nyse.com/about/listed/lc_ny_name_A.html?ListedComp=All

NASDAQ (National Association of Securities Dealers Automated Quotations)
http://www.nasdaq.com/screening/company-list.aspx

Yahoo links for a given ticker symbol – here using MSFT (Microsoft)

Main Page - http://finance.yahoo.com/q?s=MSFT&ql=1

Headlines - http://finance.yahoo.com/q/h?s=MSFT+Headlines

Profile - http://finance.yahoo.com/q/pr?s=MSFT+Profile

Key Statistics - http://finance.yahoo.com/q/ks?s=MSFT+Key+Statistics

Competitors - http://finance.yahoo.com/q/co?s=MSFT+Competitors

Industry - http://finance.yahoo.com/q/in?s=MSFT+Industry

Historical Prices - http://finance.yahoo.com/q/hp?s=MSFT+Historical+Prices

Download Historical Prices

http://ichart.finance.yahoo.com/table.csv?s=MSFT&d=1&e=23&f=2011&g=d&a=2&b=13&c=1986&ignore=.csv

1/23/2011, granularity=d (day), back to 2/13/1969, format CSV (comma separated values)