(/ˈeɪsɒs/ AY-soss) is the UK's largest online-only fashion and beauty store. Primarily aimed at 18–34 year old men and women, ASOS sells both branded fashion goods and its own range of clothes. Sales for the financial year ending 31 March 2011 were £339.7 million. In May 2012, ASOS reported a jump in pre-tax profits from £15.7 million to £30.3 million, with sales up 46% at £495 million. is a global online fashion and beauty retailer and offers over 50,000 branded and own label product lines across womenswear, menswear, footwear, accessories, jewellery and beauty. ASOS has websites targeting the UK, USA, France, Germany, Spain, Italy and Australia and also ships to over 190 other countries from its central distribution centre in the UK.

ASOS has over 13.6 million unique visitors a month and as of 30 September 2011 had 6.3 million registered users and 3.7 million active customers from 160 countries (defined as having shopped on ASOS in the last 12 months).

ASOS's headquarters are located in Camden Town, an area in, within a building known as Greater London House. Its main fulfillment centre is in Barnsley, Yorkshire. Customer Care department is based in Hemel Hempstead.

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