As far as I know, the FLOAT shares are the only shares that can be traded. The FLOAT of FCCN is 53,000,000.
Authorized shares are the whole kit and caboodle -- the maximum number of shares of stock that a company may legally create under its Articles of Incorporation. Authorized shares can only be changed by shareholder approval. (And you thought your shareholder voice didn't count!) There are generally more authorized shares than any other type. By keeping the number of authorized shares higher than those actually issued, management can always sell more shares if they need to raise additional funds or make an acquisition. Those extra authorized but unissued shares also come in handy when employees exercise their stock options.
Outstanding shares are the number of shares of stock that have been issued. It includes restricted shares (insider holdings that can't be sold without SEC notification or are under some other kind of sales restriction) and shares held by the public (see float below). Outstanding shares are used in the calculation of things like market capitalization (price times shares outstanding), book value (usually expressed as a dollar amount per share), and the ever-popular EPS (earnings per share). This is the number that really matters.
The float is the number of shares floating around in public hands that are available for trading The formula for finding the float is: outstanding shares - restricted shares = float. But if you're mathematically challenged, a superior way to locate a company's float is by heading over to our quote area, typing in a ticker symbol, and clicking on Snapshot.
http://www.fool.com/ddow/2000/ddow000321.htm