Index was a catalogue retailer in the United Kingdom, that was owned by Littlewoods from 1985 until 2005. Many Index stores were attached to Littlewoods stores. It was a well-known retailer in the 1980s and the 1990s, but after sales began to decline in the 2000s, its popularity became disputable and it started losing many customers to its rival, Argos.During their 20-year history, Index lost £100 million, eventually causing Littlewoods to sell the shops.