Definition of "BTS"

Initialism of behind the scenes.  examples

(software) Initialism of bug tracking system.  examples

(Malaysia, colloquial) Initialism of Berjaya Times Square (“a shopping complex in Kuala Lumpur”).  examples

(music) Initialism of Bangtan Sonyeondan (“a South Korean boy band”).  examples

(Thailand) Initialism of Bangkok Mass Transit System.  examples