CRL
- Brussels South Charleroi Airport
- CRL Group
- Canada Rugby League
- Canons Regular of the Lateran
- Center for Research Libraries
- Certificate revocation list
- Certified Registered Locksmith
- Chalk River Laboratories
- Championship Racing League
- Charles River Laboratories
- Chemistry Research Laboratory, University of Oxford
- Chicago Rail Link
- City Rail Link
- Co-operative Retail Logistics
- Complete Response Letter
- Computational Research Laboratories
- Corsair International
- Country Rugby League
- Countrywide
- Cross Island Line
- Crown-rump length
- East Cree
- United States Air Force Infrared Sky Surveys