| Acronym | Definition |
|---|
| CSIR | Council for Scientific and Industrial Research (South Africa and Ghana) |
| CSIR | Council of Scientific and Industrial Research (New Delhi, India) |
| CSIR | Channel State Information Receiver |
| CSIR | Centre for Scientific and Industrial Research |
| CSIR | Corpo di Spedizione Italiano (Italian Army Division; WWII) |
| CSIR | Chemistry Software and Information Resources |
| CSIR | Computer Security Incident Response |
| CSIR | Center for the Study and Improvement of Regulation |
| CSIR | Capacitively Stepped-Impedance Resonator |
| CSIR | Capacitor Start Induction Run (electronics) |
| CSIR | Classified Search and Image Retrieval |
| CSIR | Channel State Information Available to the Receiver |
| CSIR | Computer Systems Integration Review (hardware/software; NASA) |
| CSIR | Communications-Computer Systems Installation Record |
| CSIR | Class Schedule and Instructional Record (University of California, Berkeley) |
| CSIR | Centrum Srodowiska i Rozwoju (Poland) |
| CSIR | Communications Systems Installation Records |
| CSIR | Centre Social d'Intégration aux Réfugiés (French) |