Compulsory Third Party, a type of motor vehicle insurance

Crew Trainer's Program, McDonald's New Zealand training program

Cambridge Technology Partners, a software service firm, now part of Novell

Certified Turfgrass Professional, a professional certification of the Professional Landcare Network

Cristian Tudor Popescu, a Romanian journalist and writer

Computer to plate, an imaging or prepress technology in modern lithographic printing

Republican Turkish Party (Cumhuriyetçi Türk Partisi)

MIT Center for Theoretical Physics, research center at Massachusetts Institute of Technology

Convergence Technologies Professional

Confederación de Trabajadores del Perú

Certified Treasury Professional

Conformance Testing Program, operated by the Storage Networking Industry Association

Community Technology Preview, a Microsoft software preview release

Cytidine triphosphate, a nucleotide

CTP is the ICAO airline designator for Tashkent Aircraft Production Corporation, Uzbekistan