| Acronym | Definition |
|---|
| OLS➣Our Lady of Sorrows (various organizations) |
| OLS➣Ordinary Least Squares |
| OLS➣Operation Lifesaver (various locations) |
| OLS➣Online Linguistic Support (Erasmus) |
| OLS➣Ottawa Linux Symposium |
| OLS➣Oracle Label Security |
| OLS➣Open Linux Server |
| OLS➣Ontology Lookup Service |
| OLS➣on Line Service |
| OLS➣Operational Level System |
| OLS➣on Line Shopping |
| OLS➣on Line Storage |
| OLS➣on Line Solutions |
| OLS➣on Line System |
| OLS➣Off Line State |
| OLS➣Originating Line Screening |
| OLS➣Open Learning Support |
| OLS➣on Line Subscription Service |
| OLS➣on Line Short |
| OLS➣Off Line System |
| OLS➣on Line Submission |
| OLS➣on Line Survey |
| OLS➣Online Service |
| OLS➣Operation Lifeline Sudan |
| OLS➣Office of Legislative Services (various governments) |
| OLS➣Operational Linescan System |
| OLS➣Oleander Leaf Scorch (plant disease) |
| OLS➣Online Library System |
| OLS➣Online System |
| OLS➣Organizational Leadership and Supervision |
| OLS➣Oracle Label Security (software feature) |
| OLS➣One-Leg-Stand (field sobriety test) |
| OLS➣Outlaw Star (anime series) |
| OLS➣Online Learning System |
| OLS➣Orix Leasing Singapore |
| OLS➣On Line Support |
| OLS➣Optical Landing System |
| OLS➣Ontario Land Surveyor (Ontario, Canada) |
| OLS➣Optical Line System |
| OLS➣Open Location Services |
| OLS➣Operational Line Scanner |
| OLS➣Oil Logistics Systems (Japan) |
| OLS➣Our Little Secret Corp. (Canada) |
| OLS➣Orthogonal Least Square |
| OLS➣One Local Summer |
| OLS➣Optical Line Scanner |
| OLS➣Optical LAN (Local Area Network) Solutions (Verizon) |
| OLS➣Orbital Launch Services |
| OLS➣Outer Letter Sheet (philatelic term) |
| OLS➣Optical Link System |
| OLS➣Off-Line Settling |
| OLS➣Overlap Save Algorithm |
| OLS➣OL Slaton (Junior High School; Lubbock, TX) |
| OLS➣Operation Liberty Shield |
| OLS➣Order of the Lion of Styria (apostolic religious order; Northridge, CA) |
| OLS➣Own Label Supply (UK pharmacy) |