Tradacoms is an early standard for EDI (Electronic Data Interchange) primarily used in the UK retail sector. It was introduced in 1982 as an implementation of the UN/GTDI syntax, one of the precursors of EDIFACT, and was maintained and extended by the UK (now called ). The standard is obsolescent since development of it effectively ceased in 1995 in favour of the GS1 EDI subsets. Despite this it has proved durable and the majority of the retail EDI traffic in the UK still uses it.