What does PTO stand for?

Desiderio & Taylor,Planning Tax-Exempt Organizations (SAUS)

North West Geomatics Ltd. - Canada - ICAO designator (FAAC)

Pacific Theater of Operations - World War II

Packard Truck Organization - Defunct (EA)

Paid Time Off (NFD)

Paraffin Transformer Oil - Petroleum engineering

Parent-Teacher Organization (SAUS)

Participating Test Organization - Air Force

Participating Transmission Owner

Partners Oil & Mining - Vancouver Stock Exchange symbol

Part Time Operation (DA)

Patent and Trademark Office - Formerly, PO - Department of Commerce

Pato Branco - Brazil - Airport symbol (OAG)

Pattern Trigger Output (VLIE)

People, Topics, Opinions - A publication - British

Percutaneous Transhepatic Obliteration (STED)

Perlsucht Tuberculin Original - Medicine (MAE)

Perlsucht-Tuberculin Original (SAUS)

Permeability Tuned Oscillator (SAUS)

Permeability-Tuned Oscillator (IAA)

Personal Time Off (DAVI)

Personal Time-off - Military technology (DDF)

Personal Trust Officer - Banking (TBD)

Physical Training Officer (SAUS)

Plant Transfer Out (SAUS)

Please Turn Over - the page

Portland Terminal-Oregon - Federal Railroad Administration identification code

Porto - Serro Do Pilar - Portugal - Seismograph station code, US Geological Survey (SEIS)

Port Transportation Officer

Power Takeoff - Automotive engineering

Power Test Operations (MCD)

Powertrain Operations - Auto manufacturer corporate structure

Preliminary Technical Order (ACAE)

Prevent Take-Off (SAUS)

Primary Test Organization (ACAE)

Principal Technical Officer (SAUS)

Professional and Technology Officer - British

Project Technical Office - Military (DNAB)

Project Type Organization (AAG)

Proof Test Orbiter - NASA

Propellant Transfer Operation (AFM)

Provisional Topographic Overprint (SAUS)

Public Telecommunication Network Operator (SAUS)

Public Telecommunications Operator (NITA)

Public Trust Office - Australia

Punched Tape Output (SAUS)

Purdue Teacher Opinionaire - Test

Pyridinethiol Oxide - Pharmacology

Zoe - Language code (ETLW)

Please Turn Over (WDMC)