The server is (2017) an Acer Aspire netbook. Plugged into it with cables are
Any laptop can be used to connect to the server via the "tattyhut" WiFi and then use the version control system to synchronise cave data. Many people prefer to use the expo laptop 'tunnock' as then they don't have to install any software on their own laptop.
At the end of expo the server is brought back to the UK and synchronised with the server expo.survex.com .