There are more than one artist with this name: 1) Portuguese black metal. D.O.R. stands for "Death Overcomes Reality". DOR also means PAIN in Portuguese. 2) Swedish new wave band from Stockholm, active around 1982. They appeared on the compilation tape "Mun Mot Mun Metoden".
Members: Tomas Bartosz, Nils Berglund, Bo Svedberg

Read more about D.O.R. on Last.fm.