| SIIT | Sajjad Institute of Information Technology 
| Others |
| SIIT | Saskatchewan Indian Institute of Technologies
| Others |
| SIIT | Saskatchewan Indian Institute of Technology
| Others |
| SIIT | Scholars Institute of Information Technology
| Others |
| SIIT | Scholars International Institute of Technology
| Others |
| SIIT | School of Industrial and Information Technology
| Others |
| SIIT | Shandong International Institution of Translation
| Others |
| SIIT | Siargao Island Institute of Technology
| Others |
| SIIT | Significant Incident Investigation Team
| Others |
| SIIT | Sirindhorn International Institute of Technology
| Others |
| SIIT | South Institute of Information Technology
| Others |
| SIIT | Standardisation and Innovation in Information Technology
| Others |
| SIIT | Standardization and Innovation in Information Technology
| Others |
| SIIT | Stateless IP ICMP Translation
| Others |
| SIIT | Stateless Ip Icmp Translator
| Others |
| SIIT | Summer Intensive Interpreter Training
| Others |
| SIIT | Suzhou Institute of Industrial Technology
| Others |
| SIIT | Sydney Institute of Interpreting and Translating
| Others |
| SIIT | Systematic Institute of Information Technology
| Others |