British vehicle registration for Dundee
• Cytology sarcoplasmic reticulum
• Saudi riyal (Saudi Arabian monetary unit)
• Saunders Roe (aircraft)
• (USA ) Senate resolution
• service rifle
• Computing setreset
• symbol for Seychelles rupee (monetary unit)
• (formerly, USSR ) Socialist Revolutionary (Party)
• Society of Radiographers
• (USA ) Sons of the Revolution
• Southern Railway (now Region)
• Physics special relativity
• Military Special Reserve
• Taxation standard rate
• (or S-R) Psychol. stimulus-response (as in SR theory )
• Chem. stoichiometric ratio
• British fishing port registration for Stranraer
• postcode for Sunderland
• Sveriges Radio (Swedish broadcasting corporation)
• airline flight code for Swissair
• Physics synchrotron radiation
• synthetic rubber