Microsoft's Don Mattrick has described the new Xbox One as an "unrivalled device" in an interview with the BBC after the launch of the next-generation console.
CEO Tim Cook has spoken out in defence of Apple, after a Senate committee accused the company of using "a complex web of offshore entities" to avoid paying billions of dollars in US income taxes.
New York University's Tisch School of the Arts explores the use of today's communications technologies - and how they might enhance people's lives tomorrow.
Former LulzSec hacker Jake Davis, who has received a 24 month sentence for computer hacking, talks to Newsnight's Susan Watts about his time as part of the group.