| Acronym | Definition |
|---|
| MTO | Made to Order |
| MTO | More Than One |
| MTO | Monto |
| MTO | Make-To-Order |
| MTO | Medium-Term Objective (budgets) |
| MTO | Mediterranean Theater of Operations |
| MTO | Ministry of Transportation of Ontario (government of Ontario, Canada) |
| MTO | Mineral Titles Online (various locations) |
| MTO | Microsystems Technology Office |
| MTO | Manton (Amtrak station code; Manton, MI) |
| MTO | Methanol-to-Olefin (energy process) |
| MTO | Music Theory Online (journal; Society for Music Theory) |
| MTO | Master Terminal Operator |
| MTO | Many to One |
| MTO | Make to Order |
| MTO | Medical Time Out (tennis) |
| MTO | Media Take Out (celebrity gossip website) |
| MTO | Multi-Modal Transport Operator |
| MTO | Mandatory Tender Offer (various companies) |
| MTO | Millennial Territory Orchestra (Steven Bernstein) |
| MTO | Mid Term Objective |
| MTO | Moving to Opportunity for Fair Housing (US HUD) |
| MTO | Metropolitan Tenants Organization |
| MTO | Motor Transport Officer (various armed forces) |
| MTO | Mandatory Time Off |
| MTO | Maximum Tolerable Outage |
| MTO | Mass Transfer Operations (chemical engineering) |
| MTO | Master Terminal Operator (IMS) |
| MTO | Message To Observer |
| MTO | Material Take Off |
| MTO | Medical Technical Officer |
| MTO | Mineral Turpentine Oil (manufacturing) |
| MTO | Medical Training Officer |
| MTO | Money Transfer Operator (various companies) |
| MTO | Material Transfer Order |
| MTO | Memory Test Option |
| MTO | Motor Tax Office |
| MTO | Managers Time Out (various locations) |
| MTO | Mission Tasking Order |
| MTO | Modified Toy Orchestra (UK) |
| MTO | Media Time-Out (sports) |
| MTO | Manufacturing Technology Objective |
| MTO | Maintenance Tasking Order (various organizations) |
| MTO | Main Track Only (horse racing) |
| MTO | Method to Operate |
| MTO | Ministère du Transport de l'Ontario (French: Ministry of Transportation Ontario; Ontario, Canada) |
| MTO | Maritime Trade Operations |
| MTO | Medical Teaching Organisation |
| MTO | Metal Turn Over |
| MTO | Mexicans Taking Over (band) |
| MTO | Manager of Train Operations |
| MTO | Maritime Tasking Order (US Navy) |
| MTO | Midshipman Training Officer |
| MTO | Munger Tolles & Olsen LLP (California law firm) |
| MTO | Member Telephoned Office |
| MTO | Multi Territorial Operator (wireless communications) |
| MTO | Missionary Teens Only (Netherlands) |
| MTO | Modernization Transition Ombudsman |
| MTO | Modernization Transition Overlay |