So why is it "Texas IPSC" and not "Texas USPSA" or "Texas Action shooting" or whatever? Well, when it started, IPSC was about all there was, the rules were the same as USPSA's and IPSC is a whole lot easier to pronounce. History has done the rest.
Texas IPSC covers USPSA, Steel Challenge, Bowling Pin, IDPA and all sorts of action-shooting type matches. Don't be limited by the name ;)