I'm a NERD!!
I work for Hewlett Packard CDS - Secure Systems Group.
I work on desktops, printers, servers, laptops, network kits and such like on MoD sites in the UK and also a 1 in 3 out of hours roster for major customers such as Tesco on their distribution warehouses and stores which entails going to sites at stupid o'clock to fix things so the store can remain operational - 1 instance last October meant if I didn't fix a server then the whole store would be closed for a day resulting in a massive loss in revenue... 7 hours onsite waiting for parts and Lunky saved the day by bringing the store online at 09:50... The store opened at 10:00 as normal!!!