Most Known Basketball Leagues (Men)

Americas

• NBA - National Basketball Association
• AABA - All-American Basketball Alliance
• WBA - World Basketball Association
• ABA - American Basketball Association
• NBL - National Basketball League Canada

Asia

• CBA - Chinese Basketball Association
• CUBA - Chinese University Basketball Association
• PBA - Philippine Basketball Association
• PBL - Philippine Basketball League
• LP - Liga Pilipinas
• KBL - Korean Basketball League

Europe

• NBL - National Basketball League
• LCB - Portuguese Basketball League
• BBL - British Basketball League
• Euroleague

                                                       

 Source : http://en.wikipedia.org/wiki/List_of_basketball_leagues#Americas