Supermarkets revolutionised the way people shopped and by the 1970s Tesco was building a national store network to cover the whole of the UK, which it continues to expand to this day, while also diversifying into other products.
In 1974 Tesco opened its first petrol stations, and would become the UK's largest independent petrol retailer. By 1979 total sales topped £1bn, and by 1982 sales had doubled to more than £2bn.
In 1987 Tesco successfully completed a hostile takeover of supermarket rival Hillards for £220m.
The battle for top spot
In the 1990s Tesco continued to tighten its grip on the UK with more store openings and an agressive marketing campaign in an attempt to overtake Sainsbury's as the UK's leading grocer.
In 1992, the company launched is slogan 'every little helps', followed by the Tesco Value range in 1993. This was followed by the launch of the Tesco Clubcard scheme in 1995, helping Tesco to overtake rival Sainsbury's as the UK's largest food retailer.
1996 saw the retailer introduce its first 24-hour store while it also expanded overseas opening shops in Poland, the Czech Republic, and Slovakia. In 1997 Tesco appointed Sir Terry Leahy as chief executive.
Tesco.com was launched in 2000 and the supermarket continued to expand its range of products, which now includes clothes, electricals and personal finance products. In 2004 Tesco entered the broadband market.
Two years ago, in 2006, the retailer announced ambitious plans to open stores in the US under the name 'Fresh and Easy' and funded by existing resources. Tesco now operates in 13 countries.
Today it reported that group sales were £51.8bn in the year to February 23 2008. Pre-tax profit rose to £2.8bn.
In 2008 the retail giant took its conquest of the UK one step further by buying up some rival Somerfield stores on remote