Tech Weekly Podcast: 2013 - the year in tech and digital

From the launch of Google Glass to Microsoft's Steve Ballmer stepping down, from Twitter's launch on to the stock market to revelations of NSA and GCHQ online surveillance, it's been a big year for the tech team. Aleks Krotoski is joined by Charles Arthur, Guardian technology editor, Jemima Kiss, Guardian head of technology, and Guardian tech reporters Alex Hern and Samuel Gibbs, to sum up the year in technology. Also the team welcome Jemima "Jem" Garthwaite, social media expert and co-founder of This Here, a data-led creative start up.