| CID | Charge Injection Device | - | Computer Acronyms(common) |
| CID | Collision-induced Dissociation | - | Computer Acronyms(common) |
| CID | Configuration Interaction With Double Substitution | - | Computer Acronyms(common) |
| CID | Configuration Interaction With Doubly Excited Configurations | - | Computer Acronyms(common) |
| CID | Cervical Immobilization Device | - | Medical(slang) |
| CID | Computer Interface Device | - | Organizations |
| CID | Consider It Done | - | Sms Text Smileys and Emoticons |
| CID | Consider It Done | - | ISO Country Codes |
| CID | Crying In Disgrace | - | ISO Country Codes |
| CID | Combat Identification -Criminal Investigation Division - Criminal Investigations Department | - | Astronomy |
