Air travel with batteries

This recent directive from the Transport Safety people does as much to obscure and confuse as it does to communicate. Its random emphasis is particularly unhelpful.
The rules categorise lithium-ion batteries into three classes by means of their “lithium content equivalent”. These classifications are not labeled on batteries, but translate roughly into Normal (<100wh), Large (100-300wh), [...]

X Windows on the XO Laptop

The XO laptop is a fun toy much appreciated Christmas present and a nice donation to a good cause. Thank you very much also to T-Mobile for the free year of Hotspot that comes with it – in itself a $240 value.
The system has a different operating paradigm – oriented towards children it hinges on [...]