What does Ro stand for?

Output Resistance (IDOE)

Observer (Radio) - British military (DMA)

Omani Rial - Monetary unit (IMH)

RADAR Observer

RADAR Operator

Radiation Office - Environmental Protection Agency

Radiological Officer - Department of Emergency Management (DEMM)

Radionavigation Mobile Station - ITU designation (CET)

Radio Observer (SAUS)

Radio Officer - Emergency Management (EMA)

Radioopaque

Radio Operator

Radio Orchestra

Radio Orient (IAA)

Radio-Oscillator (SAUS)

Railway Office - British (ROG)

Range Only (CAAL)

Range Operation (AAG)

Range Operator

Rank Organisation Ltd. - Toronto Stock Exchange symbol

Rawlings Official - Baseball term (NDBD)

Reactor Operator - Nuclear energy (NRCH)

Read Only - Computer science (IBMDP)

Readout (KSC)

Reality Orientation

Rebate-Government Condominium Association - Electric utility company

Receiving Office - or Officer

Receiving Officer (SAUS)

Receiving Order - Business term (DCTA)

Reconnaissance Officer

Recorders - JETDS nomenclature - Military (CET)

Recorders Office (SAUS)

Record Only - Motor vehicle violation driver status code in state of North Dakota (MVRD)

Record Output (SAUS)

Record Overflow (SAUS)

Records Office - or Officer - Air Force (AFM)

Records Officer (SAUS)

Record Zero (SAUS)

Recovery Operations - NASA

Recruiting Officer - Military

Recruitment Office (SAUS)

Recto - Also, R

Reddish Orange

Redistribution Order - Military (DNAB)

Reference Oscillator - Telecommunications (OA)

Referral Order - Military (DNAB)

Regimental Orders - Army

Regional Office - or Officer

Regional Officer (SAUS)

Registered Office (WDAA)

Register Output

Regulated Output (FAAC)

Relieving Officer (ROG)

Relocatable Output - Computer science

Remains Open - Environmental science (COE)

Remote Operations - Telecommunications (OSI)

Renewal Only - FCC application purpose code (FCCC)

Rent Officer - British (ILCA)

Repair Order

Repolarization Opening - Biochemistry

Reportable Occurrence - Nuclear energy (NRCH)

Reporting Officer - Army (AABC)

Report Over (DA)

Reproducible Ozalid (DNAB)

Requirements Objective

Requisitioning Objective - Military (AABC)

Research Objective (MCD)

Research Officer - British

Reserve Officer (SAUS)

Reserve of Officers - British

Reserve Order

Responding Officer - Police term

Responsible Office (AAGC)

Restriction Orifice - Nuclear energy (NRCH)

Retired Officer - Military - British

Retrofit Order - Navy (NG)

Returning Officer (ROG)

Revenue Officer - IRS

Reverse-Osmosis - Physical chemistry

Rework Order (MCD)

Rhodochrosite (SAUS)

Right Observer (SAUS)

Right Opening (WDAA)

Right Orifice (WDAA)

Right Out (SAUS)

Right Outboard (MCD)

Rimoil Corp. - Toronto Stock Exchange symbol

Ring Out (VLIE)

Rip Out (DNAB)

Ritter-Oleson Technique - Medicine (MAE)

Road (WGA)

Road Oil (SAUS)

Roan - Thoroughbred racing

Rock - Germany - ICAO aircraft manufacturer identifier (ICAO)

Roll

Roll Off (SAUS)

Roll-On - Trailer ship (DICI)

Romania - ANSI two-letter standard code (CNC)

Romans - Old Testament book

Romer - NCIC firearms make code (NCIC)

Rood - Unit of measurement

Room Only

Roper Organization (EA)

Rose (ROG)

Rosenheim - German license plate city code

Rough - Lumber (WOHB)

Rough Opening - Technical drawings

Round Off (IAA)

Roundout - Army

Route Order - Military

Routine Order

Routing Office - or Officer - Navy

Routing Officer (SAUS)

Rowed Over - Rowing - British (ROG)

Royal Observatory - British

Royal Octavo

Royal Olympic Cruises (EFIS)

Royal Ordnance (SAUS)

Royal Ordnance Factory - British

Runoff Election

Runout (MSA)

Runover - Publishing

Russian Obuckhoff Rifle

Rust and Oxidation (DNAB)

Ruthenium Oxide (SAUS)

Hoffmann-La Roche, Inc. - Switzerland, USA - Research code symbol

Recto - On the right hand page (WA)

Rhodium - Correct symbol is Rh - Chemical element

Rodoicus - Authority cited in pre-1607 legal work (DSA)

Roffredus Beneventanus - Flourished, 1215-43 - Authority cited in pre-1607 legal work (DSA)

Rolandus Bandinelli - Deceased, 1181 - Authority cited in pre-1607 legal work (DSA)

Rolle's Abridgment - A publication (DLA)

Rome Stock Exchange - Italy

Rossby number (SAUS)

solar Radius (SAUS)