What does ru stand for?

rusted (SAUS)

Rutile - CIPW classification - Geology

Gosudarstvennaia Biblioteka SSR Imeni V. I. Lenina - Lenin State Library of the USSR, Moscow, Soviet Union - Library symbol - Library of Congress (LCLS)

Rufinus - Flourished, 1150-86 - Authority cited in pre-1607 legal work (DSA)

Ruins

Rural

Russian - Linguistics (IEL)

Ruth - Old Testament book

Ruthenium - Chemical element

Are You - Communication

Britt Airways - ICAO designator (AD)

Rack Unit (SAUS)

RADAR Unit (MCD)

Radford University (SAUS)

Radioactive Uptake - Radiology (DAVI)

Radio Uganda (SAUS)

Radium Unit (SAUS)

Railroad Underwriter (SAUS)

Railway Underwriter

Rain Umbrella - An association (EA)

Range Unit

Range User

Rat Unit

Readers Union (SAUS)

Readers Union Rugby Union (NADA)

Reading of Unknown

Ready Use - British

Receive Unit (SAUS)

Recovery Unit (SAUS)

Rectourethral (DAVI)

Refrigeration Unit (KSC)

Regular Unleaded - Shell Oil Co.

Reinforcement Unit - British military (DMA)

Relative Unit - Typography

Release Unit - Army (AABC)

Remote concentrator Unit (SAUS)

Remote Unit (NASA)

Renaissance Universal (EA)

Repeat Unit - Genetics

Replaceable Unit

Replacement Unit

Reporting Unit (SAUS)

Reproducing Unit

Request/Response Unit - Computer science

Request Unit (SAUS)

Rescue Unit (COE)

Reserve Unit - Equal to one US dollar - International finance - Former USSR

Resin Uptake - Endocrinology

Resistance Unit (MAE)

Respiratory Unit - Medicine

Response Unit (SAUS)

Response Unlimited - Commercial firm

Restricted Usage (VLIE)

Retransmission Unit - RADA - Army

Retrograde Urogram - Medicine (MAE)

Re-Usable (SAUS)

Rhodes University Grahamstown, South Africa (SAUS)

Rice University (SAUS)

Rice (Upland) - Soil biology - Human-introduced crops (QSUL)

Rifle, Percussion - NCIC gun type code (NCIC)

Right Upper - Medicine

Right Upstage - Theater (WDMC)

Rig up (SAUS)

Ritsumeikan University (SAUS)

Rockefeller University (UWER)

Roentgen Unit - Also, r - Measuring X and gamma radiations

Romania - NCIC country-territory code (NCIC)

Roosevelt University (SAUS)

Rotate Upward (SAUS)

Roussel - France - Research code symbol

Routine Urinalysis (SAUS)

Rudic - Soil biology - Soil phases (QSUL)

Rugby Union - Controlling body of British rugby football

Runic - Language, etc. (ROG)

Run Unit (NITA)

Russian Federation - Internet country code

Rutgers-- The State University - New Brunswick, NJ (PDAA)

Rutgers University (SAUS)

Ruth

Ruthenium

Rutin - Organic chemistry

Unborrowed Reserves

University of Rhode Island, Kingston, RI - Library symbol - Library of Congress (LCLS)

Ursuline Nuns of the Congregation of Tildonk, Belgium - Roman Catholic religious order