In pictures: in Prague with AV firm Avast

Last week, V3.co.uk went to the Czech Republic to find out more about Avast, maker of arguably the world's most popular anti-virus tool. The firm has only one office globally, in the country's capital city of Prague, and a skeleton staff of just 150 people, but manages to produce products with an estimated user base of over 127 million consumers and businesses worldwide.

Below: Avast has the top four floors of this rather modern building a few kilometres from Prague's historic centre, having soon outgrown the cramped confines of its previous office.

Below: According to the firm itself, Avast's free product has been downloaded by nearly 140 million users worldwide, not bad considering the company started with just 93 free users in 2002.

Below: Avast prides itself on being able to protect all its customers with a very small team of virus researchers. The virus lab below is staffed by only eight to 10 people thanks to a high level of automation. In addition, Avast uses the endpoints of its 140 million customers to detect threats globally.