// Workers AI · dad joke modeWhy was number 4 sad? Because it was a little odd.

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)