PC operating systems

The world of home computing is dominated by MS Windows and Apple Mac (to a lesser extent), whereas I understand Linux is used by the most powerful computers in the world.  

I mostly use a Chromebook that runs Chrome OS (using it now) and am so pleased with this OS.  It is fast and does almost everything I do. They also tend to be less expensive. The Chromebook has been used for years now.

A friend of mine did an external drive with a version of Linux, but I have resisted changing my Windows PC to Linux, for now at least.

I am  definitely not a PC expert, so tend to remain with what I know!

Worked all Cambridge(shire)

The Cambridge club (CDARC) is launching a scheme like a mini WAB scheme called "Worked all Cambridge (or is it Cambridgeshire?)". The object is to work stations in all the Ordnance Survey 10km squares in the county. For example, I am in TL56 square. I think it runs for a year, but as I do not have details yet, I have no idea how many squares there are. I can imagine some in the Fens are quite hard. What a fun scheme for a club.