4R may refer to: 4R Family restaurants in Northern California Galaxy 4R, a Panamsat-owned communications satellite Ponceau 4R, a synthetic colourant Hamburg International airline's IATA code Nachtjagdgeschwader 2, from its historic Geschwaderkennung code with the Luftwaffe in World War II Sri Lanka aircraft registration A standard consumer print size for photographs. See Standard photographic print sizes the Railroad Revitalization and Regulatory Reform Act, also known as the "4R Act" the short-lived acronym for Neljä ruusua ('Four Roses'), a Finnish band, aiming for a broader international appeal 4R, the production code for the 1977 Doctor Who serial The Robots of Death See also The four Rs (disambiguation) specifically Reduce, Reuse, Recycle, Replace, as in waste hierarchy - for instance in Hong Kong R4 (disambiguation)