PTSI

AcronymDefinition
PTSIP.A.M. Transportation Services, Inc. (est. 1986; Tonitown, AR)
PTSIPlatinum Silicide
PTSIPupil Transportation Safety Institute (Syracuse, NY)
PTSIPanhandle Telecommunication Systems, Inc.
PTSIPhilippine Tuberculosis Society, Inc.
PTSIPancreatic Secretory Trypsin Inhibitor (protease inhibitor)