Later on, successful buyers can simply swap their engineering units in for a final version of the 16GB or 32GB Xiaomi Phone 2 -- the latter a new addition that co-founder Lei Jun announced on Sina Weibo last Saturday (where he also cheekily asked if anyone need a 64GB flavor).

ENGADGET: Xiaomi Phone 2 pre-production units available on September 22nd, limited to 600 lucky buyers

After public comments on the guidelines are reviewed, a final version is due to be published next year by the American Society for Healthcare Engineering.

WSJ: Children's Hospitals Make Room for Mom, Dad and Diversions

The standard they designed was approved early this year by the Internet Engineering Steering Group, the body that helps manage the global network, and an updated version of it was published on the Internet last week.

CNN: COMMUNICATION

Dr Keith's version of the technology, which he hopes to commercialise through a company called Carbon Engineering, based in Calgary, uses a liquid to suck up the CO2.

ECONOMIST: Combating climate change

In other cases, like with the new settings menu, they were part of Microsoft's plan all along -- the engineering team just didn't get to them before it was time to ship the first version of Win 8.

ENGADGET