| Acronym | Definition |
|---|
| BTO | British Trust for Ornithology |
| BTO | Bachman Turner Overdrive (band) |
| BTO | Build-Transfer-Operate |
| BTO | Brutto (German: Gross [quantity]) |
| BTO | Business Technology Optimization |
| BTO | Buy to Open (investing) |
| BTO | Business Transformation Outsourcing |
| BTO | Bridge and Tunnel Officer (various locations) |
| BTO | Back to Office |
| BTO | Build to Order |
| BTO | Big Time Operator |
| BTO | Back to Original (various companies) |
| BTO | Business Technology Office (McKinsey & Company) |
| BTO | Burst Timing Offset (radio transmissions; aviation) |
| BTO | Breakthrough Objective (business strategy) |
| BTO | Brigade Tactical Officer (US Military Academy) |
| BTO | Burnin Track Outlaws |
| BTO | Build/Built To Order |
| BTO | Betts Telecom Oklahoma |
| BTO | Blood Transfusion Officer (India and Pakistan) |
| BTO | Blanket Travel Order |
| BTO | Branch Take Off (heating and cooling system part) |
| BTO | Black Timber Outfitters (South Hyrum, UT) |
| BTO | Black Tie Only |
| BTO | Branch Transportation Office(r) |
| BTO | Bombing Through Overcase |
| BTO | Back To One publications (Hollywood, CA) |
| BTO | Begin Time Option |
| BTO | Business Transition Office |