Tech review: A look back at the week's headlines
BBC Click rounds up some of the week's top technology stories, including the news that the next version of Microsoft's operating system, Windows 10, will support holographic features that will project the OS over views of the real world.
Messaging platform, WhatsApp has imposed 24 hour lock-outs on people trying to access its service via WhatsApp Plus over concerns that the unofficial programme might cause private data to be leaked to third-parties.
And physicists in the US have created metal surfaces that "self clean" by repelling water.
23 Jan 2015