| Acronym | Definition |
|---|
| NCO | Non-Commissioned Officer (military) |
| NCO | Network Centric Operations |
| NCO | No Cost Option (various companies) |
| NCO | Net Capital Outflow (finance) |
| NCO | NCEP Central Operations |
| NCO | Novell Console One |
| NCO | Naming Context Object |
| NCO | Nalu Client Object |
| NCO | Nero Compressed File |
| NCO | Numerically Controlled Oscillator |
| NCO | Navy College Office |
| NCO | No-Contact Order |
| NCO | Net Charge-Offs |
| NCO | Norwegian Chamber Orchestra (Norway) |
| NCO | National Children's Orchestra (UK) |
| NCO | Nashville Chamber Orchestra (Nashville, TN) |
| NCO | New Chamber Opera (UK) |
| NCO | Noncombat Operations |
| NCO | National Chamber Orchestra |
| NCO | Number of Calls Offered (call centers) |
| NCO | Naming Context Object (computing) |
| NCO | Nephenzy Chaos Order (band) |
| NCO | non-covered officer (US CIA) |
| NCO | Negotiated Consent Order |
| NCO | Net Control Officer |
| NCO | National Collection Office, Inc (Horsham, PA) |
| NCO | Nusantara Chamber Orchestra (Indonesia) |
| NCO | National Coordination Office for the HPCC Program |
| NCO | Nuclear Control Operator |
| NCO | NEPA Compliance Office(r) |
| NCO | Nigeria Country Office (Kaduna, Nigera) |
| NCO | National Capital Orchestra (formerly the Canberra Community Orchestra) |
| NCO | Neighborhood Compliance Officer |