D1
D1 is an abbreviation for:
- D1 (computer) , calculator from NJ Lehmann
- D-1 standard for digital video recording on magnetic tape
- D1, an EU driving license class, see driving license (EU law)
- D1 network, mobile radio system from Deutsche Telekom, see D-Netz # D1-Netz
- D-Route 1, the German part of EuroVelo-Route 12 (North Sea Coast Cycle Route)
- Dálnice 1 , motorway in the Czech Republic
- Diaľnica D1 , highway in Slovakia
- Državna cesta D1 , national road in Croatia
- Fraunhofer line D 1 of sodium, see Fraunhofer line
- Routing zone 1 of the German postcodes, see postcode (Germany) #Postleitzonen und -regionen
- Nikon D1 , Nikon digital SLR camera
- Nautical chart, the first from the Federal Maritime and Hydrographic Agency (BSH, formerly DHI)
- Space Shuttle Mission 1985, German-American, see STS-61-A
- Volkswagen model, as the project name, see VW Phaeton
- Protein D1 of photosystem II, see photosystem II # structure
- D1 performance badge , see young musician performance badge #Performance levels
- Tiendas D1 , hard discount chain in Colombia
Express train connections of the Deutsche Reichsbahn:
- D 1 (Basel – Berlin) : Basel - Frankfurt am Main - Berlin Anhalter Bahnhof
- D 1 (Berlin – Eydtkuhnen) (1895–1945): Berlin Stadtbahn - Königsberg - Eydtkuhnen
- D 1 (Cologne – Berlin) : Cologne - Hanover - Berlin Stadtbahn
