| Acronym | Sense | Language | Topics |
|---|---|---|---|
| RTC | Real-Time Clock | In English | → Computer science → Horology |
| RTC | Réseau Téléphonique Commuté | In French | → Telecommunications |
| RTC | Real-Time Command | In English | |
| RTC | Real-Time Computer | In English | → Computer hardware |
| RTC | Room-Temperature Cure | In English | |
| RTC | Red Telefónica Conmutada | In Spanish | → Telecommunications |
| RTC | Remedial Teaching Center | In English | → Organizations and associations → Education |
| RTC | Réseau de Transport de la Capitale | In French | → Organizations and associations → Transport and postal services → Canada |