English abbreviations from tyc to tys
- TYC ((catalog) Tycho, a catalog that was the predecessor of the Hipparcos (HIP) Catalogue)
- TYCOM (Type Commander)
- TYD (Tynda Airport)
- TYDP (Ten Year Defence Programme (Australia))
- TYE (Tyonek Airport)
- TYF (Thanksgiving Youth Fest)
- TYFF (Teaching You Financial Fitness)
- TYG (Tumongko Youth Group)
- TYH (Teach Yourself History)
- TYHNC (Triangle Youth Hockey - North Carolina)
- TYI (Teach Yourself Irish)
- TYJ (Teach Yourself Japanese)
- TYL (Cap. FAP Víctor Montes Arias Airport)
- TYLER (Tender Young Lives Emerge Resilient)
- TYMC (Tacoma Youth Marine Center)
- TYME (Take Your Money Everywhere)
- TYN (Taiyuan Wusu International Airport)
- TYO (All Airports)
- TYP (Tribal Youth Program)
- TYPO (Take Your Professor Out)
- TYQ (Commmunications Set AN/ series)
- TYQ-23 (Tactical Air Operations Command and Control Set)
- TYQ-69 (Commmunications Control Set)
- TYQ-77 (Aviation Mission Planning System)
- TYR (Tyler Pounds Regional Airport)
- TYS (McGhee Tyson Airport)