I have my GMC-300 connected to a $35 Raspberry PI computer, made in UK. It now records my data and send the information to NETC.com, where it graphs the data. No more big computer needed, only my PI, GMC-300 and me. Check it out on http://netc.com
The chart is from the software program on NETC.com. It is web-base program that will display over 2900+ different sites. We do not have anyone in Europe, so come join us and set up a radiation monitoring site using Raspberry PI and the GMC-200 or GMC-300. The software for the Raspberry PI that runs the charts and Geiger counter is $25.00 including the 8gb chip.