Apple iPhone 5S supplies low on UK launch

Mobile phone operators report stock shortage of new flagship devices, while Apple stores sellout of limited gold edition

BlackBerry may cut 40% of workforce to bring costs under control

Plans for 5,000 job cuts across organisation reported by Wall Street Journal following decline in handset and tablet sales

Laptops: a buyer’s guide

The portable computer market now takes in netbooks and tablets as well as laptops. We look at things to consider before you make your purchase

How do I become … a stuntperson

Lee Millham risks his life for a living. Getting shot and crashing cars in concrete barriers is all part of the terrain

How Twitter became a beating pulse of global news

A look back at Twitter's rise from one tweet to a cacophony, as the social network prepares to go public

Royal Mail v Twitter: which one should you sink your savings in?

Tim Dowling: If you don't mind trolls and the absence of profit, go for the blue bird. Or if you prefer an organisation that makes a profit but has very unhappy staff, put your money where the Queen's head is

Bitcoin dealers seek official regulation for digital tokens

Digital transaction system can be used for new businesses and to promote growth, officials told at Downing Street meeting

Vodafone and O2 launch 4G, expecting rapid adoption by consumers

Ronan Dunne, chief executive of O2 in the UK, believes the take-up of superfast internet will be much quicker than for 3G technology

Cybercrime hits more than 9 million UK web users

Researchers find 8% of cybercrime victims suffered financial losses while those aged over 55 were least likely targets

Technology companies fight for funds as venture capitalists look elsewhere

Investors reluctant to take further stakes in perceivedly volatile sector until earlier ventures such as Spotify start to pay off. By Jemima Kiss

Tesco to take on American giants with own brand tablet computer Hudl

Hardware industry sources expect retailer to offer 18cm device to compete with Kindle Fire and Nexus 7

Six ideas to get more women involved in the tech sector

Why are there so few females in technology? Catherine de Lange talks to women in the sector about their experiences and ways to redress the balance