| Acronym | Definition |
|---|
| OSIS➣Open Source Internet Solutions |
| OSIS➣Open Source Information System (now Intelink-U; US DoD) |
| OSIS➣Olympus Soft Imaging Solutions (Germany) |
| OSIS➣Organisasi Siswa Intra Sekolah (student group) |
| OSIS➣Ocean Surveillance Information System |
| OSIS➣One-Stop Information Source (Texas A&M University) |
| OSIS➣Open Scriptural Information Standard |
| OSIS➣Oil Spill Information System |
| OSIS➣Open Source Infrastructure Software |
| OSIS➣One-Stop Internet Shop (European Union) |
| OSIS➣Open Shops for Information Services |
| OSIS➣Open Specification for Information Sharing |
| OSIS➣Office of Scientific Information Service |
| OSIS➣Oh Shoot, It's Sunday (polite form) |