R-phrases (short for risk phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations.
The London Underground R Stock electric multiple units were used on London Underground's District line from 1949 to 1983.
The R38 was a New York City Subway car model built by the St. Louis Car Company from 1966 to 1967 for the IND/BMT B Division.
The R38 is a provincial route in South Africa that connects Standerton with Kaapmuiden via Bethal and Barberton.
The R38 class (also known as the A class) of rigid airships was designed for Britain's Royal Navy during the final months of the First World War, intended for long-range patrol duties over the North Sea.
The Renard R.36 was a Belgian all-metal fighter aircraft designed to replace the Fairey Firefly II within the Belgian Air Force.