| CL | Class | |
| CL | Chile (country code, top level domain) | |
| CL | Champions' League (Union of European Football Associations) | |
|
| CL | CAS (Column Address Strobe) Latency | |
| CL | Close(d) | |
| CL | Claim | |
| CL | Color | |
| CL | Clearance | |
| CL | Classification | |
| CL | Closer (baseball pitcher) | |
| CL | Clinic | |
| CL | Contact Lens | |
| CL | Craig's List (online community) | |
|
| CL | Common LISP | |
| CL | Cluster | |
| CL | Control Language | |
| CL | Cloth | |
| CL | Clause | |
| CL | Circular Letter | |
| CL | Light Cruiser (Cruiser-Light) | |
| CL | Chlorine | |
| C/L | Checklist | |
| Cl | Celtic (linguistics) | |
| CL | Closet | |
| CL | Computational Linguistics | |
| CL | Common Law | |
| CL | Central Locking | |
| CL | Consumer Lab | |
| CL | Closed Loop | |
| CL | Clarinet | |
| CL | Command Language | |
| CL | Creative Loafing (Charlotte, NC weekly publication) | |
| CL | Caltanissetta (Sicilia, Italy) | |
| CL | Components List | |
| CL | Colgate-Palmolive (stock symbol) | |
| CL | Cooperative Learning | |
| CL | Chinese Language | |
| CL | Chain Link (Fence) | |
| CL | Check List | |
| CL | Copyleft (license) | |
| CL | Computer Lab | |
| CL | Clarion-Ledger (Jackson, MS newspaper) | |
| CL | Chemical Element | |
| CL | Centerline | |
| C/L | Closed Loop | |
| CL | Control Logic | |
| CL | Californian (rabbit breed) | |
| CL | County Library | |
| CL | Courtney Love (musician) | |
| CL | Civil Law | |
| CL | Confidence Level | |
| CL | Confidence Limit | |
| CL | City of London | |
| CL | Controlled Load | |
| CL | Code: Lyoko (cartoon) | |
| CL | Collaborator | |
| C/L | Centerline | |
| CL | County Line | |
| CL | Caps Lock | |
| CL | Chicken Little | |
| CL | Character Limit | |
| CL | Current Liabilities | |
| CL | Corpus Luteum | |
| CL | Connectionless | |
| CL | Child Labour | |
| C/L | Central Locking (automobiles) | |
| CL | Customer Loyalty | |
| CL | Cathodoluminescence | |
| CL | Credit Lyonnais (French Bank) | |
| CL | Compatibility List | |
| CL | Corpus Linguistics (Conference) | |
| CL | Computing Laboratory | |
| CL | Code Lyoko (French TV cartoon) | |
| CL | Carload | |
| CL | CableLabs (Cable Television Laboratories, Inc.) | |
| CL | Current Limiting | |
| CL | Centiliter | |
| CL | Comunione e Liberazione (Italian: Communion and Liberation; Catholic movement founded in 1954) | |
| CL | Cyber Law | |
| CL | Cutaneous Leishmaniasis | |
| CL | Current Loop (electronics) | |
| CL | Candidate List | |
| CL | County Law | |
| CL | Contacts List | |
| CL | Continuous Learning | |
| CL | Central League (Japanese baseball) | |
| CL | Control Limit | |
| CL | Chaos Legion (video game) | |
| CL | Competent Leader (Toastmasters) | |
| CL | Current Limiter | |
| CL | Chain Lightning (gaming) | |
| CL | Crew Leader | |
| CL | Cable Link | |
| CL | Central Luzon (Philippines) | |
| CL | Container Load (shipping) | |
| CL | Clear Liquids | |
| CL | Clan Leader (gaming) | |
| CL | Contract Labor | |
| CL | Customs Law | |
| CL | Cine Latino (Mexico) | |
| CL | Col Legno (string instrument technique) | |
| CL | Chapter Leader | |
| CL | Crimson Land (game) | |
| CL | Cathedral of Learning (University of Pittsburgh) | |
| CL | Combat Log (gaming) | |
| CL | Cactus League (baseball) | |
| CL | Compliance Level | |
| CL | Chemical Laser | |
| CL | Course Line | |
| CL | Carrier Landing | |
| CL | Common Light | |
| CL | Court Leave | |
| CL | Chess Life (journal) | |
| CL | Coefficient of Lift | |
| CL | Continuous Load | |
| CL | Control Loading | |
| CL | Center of Lift | |
| CL | Casual Leave (India) | |
| CL | Conversion Loss | |
| CL | Combat Load | |
| CL | Centre for Limnology (Nieuwersluis, Utrecht, The Netherlands) | |
| CL | Coolant Loop | |
| CL | Copper Loss | |
| CL | Cable Lug | |
| CL | Chat Life | |
| CL | Fraternity of Communion and Liberation | |
| CL | Client Logic (BPO Company) | |
| CL | Compensatory Leave | |
| CL | Catalunya Lliure | |
| CL | Coordination Level | |
| CL | Cecile Licad (classical pianist) | |
| CL | Chronic Liar | |
| CL | Coordination Line | |
| CL | Configured Load | |
| CL | Capabilities Select | |
| CL | Contract Linguist (US government) | |
| CL | Capture Latch | |
| CL | Chivalry Legions (gaming clan, Runescape) | |
| CL | Cued Language | |
| CL | Contractor Leased | |
| CL | Confrontation Line | |
| CL | Clobber Hand (gaming; Mega Man) | |
| CL | Lift Co-Efficient (aircraft) | |
| CL | Combinator Logic | |
| CL | Certificate in Logistics | |
| CL | Caritas Lebanon (Catholic charity) | |
| CL | Air Post Semi-Official (Scott Catalogue prefix; philately) | |
| CL | CodeLeakers (gaming forum) | |
| CL | Closed Loop Control Logic | |
| CL | City and County Library | |
| CL | Commonality List (NASA) | |
| CL | Compartmentalized Level | |
| CL | Clanless Losers (Counter-Strike clan) | |
| CL | Clear Job Indicator | |
| CL | Clay, Low Compressibility (LL < 50) | |
| CL | Class Complexity/Size Due to Local Methods | |
| CL | Cheerlead/Cheerleading/Cheerleader | |
| C/L | Click/Laugh | |
| CL | Controlled Iteration Last Pass | |
| CL | Clear (Morse Code abbreviation) | |
| CL | Classified Loan (finance) | |
| CL | Cliff Lee (baseball player) | |
| CL | Comparative Literature (various schools) | |
| C/L | Crash Landing (aviation) | |
| C/L | Circular Letter | |
| CL | Caprolactone | |
| CL | Catholic-Link | |
| CL | Change List (software development) | |
| CL | Cystic Lymphangioma | |