Updated We revisit Microsoft's pivotal OS from top to bottom following the massive Anniversary Update.
Browse Operating systems brands
Sierra A well-rounded update that's particularly useful for owners of Apple's mobile devices.
Updated The new version of OS X, Yosemite, ties the desktop OS closer still with Apple's mobile OS.
Updated The Start button returns, and with Update 1, users can boot straight to desktop. But this is still refinement over reinvention.
Updated There's a lot to love about Lollipop, but is it still sweet to suck now Marshmallow is out?
UPDATED iOS 9 has already seen lots of improvements over iOS 8. Here's our completed iOS 9 review.
Updated Steam Machines may be delayed, but the OS is in beta. Here are our thoughts so far and the latest details.