Tesco is one of the nation's most famous brands, with supermarkets and convenience stores up and down the country.
It serves millions of customers every week, has more than 450,000 employees and works in communities to raise money for local causes.
But it all started off with one man who used his demobilisation money from the war to buy a load of fruit and veg to flog on a market stall in the East End.
Jack Cohen served in the Royal Flying Corps during the war, and when he returned home decided he wanted to find a way to make good food affordable to everyone.
On his first day he sold £4 worth of items, making a profit of £1.
His business went from strength to strength and in 1924 the first own-brand Tesco product was born.
At this point, the business wasn't actually called Tesco - but he came up with the idea of Tesco Tea.
Rather than naming the historical product after himself, he also wanted to include a nod to the tea suppliers - TE Stockwell.
So, he took the TE and the S from them, and the CO from his own surname to form Tesco.
Jack opened his first Tesco store in Burnt Oak, north London, in 1929, which mainly sold affordable dry goods.
In 1934 he took the next step towards keeping food affordable, and bought a plot of land so he could build a warehouse, the first in the country.
This meant he had better control of stock, and could pass the savings on to his shoppers.
He spent the next few years expanding his business, opening new stores across London.
When war broke out, Jack decide to introduce rationing at his stores before the government brought it in offically. He wanted to make sure that everyone could get enough to eat during the shortage, regardless of how much money they had.
By 1955, Jack had more 500 stores and opened his first supermarket, selling a range of products including cheese, meat and butter, in Maldon, Essex, in 1959.
The first Tesco Superstore opened in Crawley in 1968. It was massive compared to other stores, measuring 40,000 sq. ft. As well as food, it sold clothing and household items.
Jack passed away in 1979, leaving behind a huge company with hundreds of stores and thousands of employees.
However his vision carried on, and in the 40 years since his death Tesco has continued to grow.
It has launched a number of schemes to help local communities, including the 1990s Computers for Schools campaign, Clubcard Points and working with the Trussell Trust to help foodbanks.
They've also kept his motto of affordable food for everyone alive by launching the Everyday Value in 2012.
The website states: "The new products focus on three main areas: quality, providing healthier options for our customers and packaging improvements that help customers identify the products on the shelves."
