Cannabis Sativa October 12, 2016October 12, 2016 thcscience_admin System 12 may refer to Namco System 12, a video game board. IBM Business System 12, a relational database management system. ITT System 12 was an early digital telephone exchange, by ITT Corporation Preceded bySystem 11 System 12 Succeeded bySystem 13 Topics referred to by the same term