CTF

• Cambridge Theological Federation, association of colleges etc. in Cambridge, England
• Canadian Taxpayers Federation
• Canadian Teachers' Federation
• Child Trust Fund, a UK child savings scheme
• Children's Tumor Foundation, United States, supports those with neurofibromatosis/schwannomatosis
• Clean Technology Fund
• Cyprus Tennis Federation
• Chow Tai Fook, Hong Kong based conglomerate

• Capture the flag (cybersecurity), an educational exercise in computer security
• Charge trap flash
• Chlorine trifluoride, a highly corrosive chemical
• Collaborative Translation Framework, a platform designed by Microsoft to improve machine translation through (possibly crowdsourced) user contributions
• Computer to film, an imaging technology used in lithographic printing
• Contrast threshold function, in physiological imaging
• Contrast transfer function, in general imaging
• Controlled thermonuclear fusion
• CTF, an undocumented Windows protocol involved with the Microsoft Text Services Framework
• Cut-through forwarding, a methodology used in network hardware

• Catford railway station (National Rail station code), London, England
• Coatepeque Airport (IATA code), Guatemala

• Canadian Television Fund
• Capture the flag, a traditional outdoor game often played by children
• Colorado tick fever
• Combined Task Force
• Commander, Task force
• Controlled Traffic Farming, a soil protection driving strategy
• Correctional Training Facility at Soledad, California
• Counter terrorism financing

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