Today let us recalling history of the nba：

NBA was established in June 1946,which was called BAA at that time, and it is due to 11 ice hockey
stadium and the museum ,it in order to make the boss outside the hockey stadium in time for idle
and will not co-sponsor of the establishment. It only 11 teams when BAA set up: the New York Knicks \
Boston Celtics \ Hua Dayton Congress \ Chicago grazing deer \ Cleveland traitor \ Detroit Falcon \
Philadelphia-earth \-horsepower It is the iron man \ Providence Steam \ bombers St. Louis and Toronto Eskimos.
In 1949 , the BAA was annexation of another Union NBL. Then called it NBA .In 1949-50 NBA season, there were had 17 teams
in it.
In 1976, NBA annexation of the ABA team to 22.
In 1980, the Charlotte Hornets and Miami Heat were joined the NBA.
In 1990, the Orlando Magic and Minnesota were joined the NBA.
In 1995, two Canadian teams were joined NBA - the Toronto Raptors and Vancouver Grizzlies.
In 2004,the Charlotte Bobcats joined the NBA as 30 teams.

If you want to know more about the history of the nba，please log on the www.nba.com