| Acronym | Definition |
|---|
| OLIS➣on Line Information Service |
| OLIS➣Office of Library and Information Services (various universities) |
| OLIS➣Oxford Libraries Information System |
| OLIS➣Ontario Laboratory Information System (Canada) |
| OLIS➣On-Line Information Services (various locations) |
| OLIS➣On-Line Instrument Systems, Inc. (Bogart, GA) |
| OLIS➣On-Line Insurance System (Canada) |