| Acronym | Definition |
|---|
| OssI➣Iron (linguistics) |
| OssI➣Operations Support System Interface |
| OssI➣Oracle Secure Search Initiative |
| OssI➣Open Source Software Institute |
| OssI➣Office of Security and Strategic Information (US DHHS) |
| OssI➣Outback Steakhouse, Inc. (stock symbol) |
| OssI➣Office of Security Services International |
| OssI➣Operation Support Systems Interface |
| OssI➣Office of Supplemental Security Income (Social Security Administration) |