PTC, Inc. (formerly Parametric Technology Corporation) is a U.S.-based computer software company specializing in 2D & 3D design software, product lifecycle management (PLM), and service management solutions. Its core product lines are PTC Creo (computer-aided design), PTC Windchill (product lifecycle management), PTC Mathcad (engineering calculation), PTC Integrity (application lifecycle management), PTC Servigistics (service lifecycle management), and PTC Arbortext (technical documentation).