FBgn0010452 also known as tartan, trn, or CG11280, a gene partly responsible for eye development in Drosophila melanogaster fruit flies; capitalized Tartan or Trn refers to a protein controlled by this gene.
Sillitoe tartan, the chequered pattern (dicing, not actually a tartan) used often on police vehicles and headgear
Tartan Army, fans of Scotland's national football team
Tartan Films, a US and UK film-distribution company
Tartan Laboratories, an American software company later known as Tartan, Inc.