3C a.k.a. Tres Coronas was a rap group, born in early 2001 in Queens, New York. Composed Colombian P.N.O, Rocca French and Dominican Reychesta, who was the founder of the group. His music addresses issues of everyday life.
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- 3c a.k.a. RegionsAir was a Part 121 regional airline. Its headquarters and maintenance base were located at the Smyrna Airport in Smyrna, Tennessee, USA|. The hub airports for RegionsAir were Lambert-St. Louis International Airport and Cleveland Hopkins International Airport.
- official website: web.archive.org/web/*/http://www.regionsair.com
- 3c a.k.a. Deccan 360 also known as Deccan Cargo & Express Logistics was a cargo airline based in Bangalore, India.
- also known as Deccan Express Logistics, Deccan Cargo & Express Logistics Private Limited
- official website: www.deccanexpress.in
- 3c a.k.a. Calima Aviación S.L., usually shortened to Calima, is an aircraft lease airline based at Gran Canaria Airport, Spain. The company was founded in 2003, and launched operations with Boeing B737CL & NG in 2008.
- official website: www.calimacrew.com
- 3C was a United Kingdom radio station, based in Clydebank, Dunbartonshire, Scotland and was provided by Radio Clyde. It played country and western music.
- official website: www.3cdigital.com
- 3C is a 2012 theater production of the play by David Adjmi.