Perhaps a bit off topic but if you are reading this blog you are presumably interested in Hertfordshire - and use a computer ....
In 1965 I started work in the computer industry, working with Shell Mex & B.P. at Hemel Hempstead. (For those of you who knew the town at the it I worked in the office building that bridged the road at the Moor End Roundabout.) I have just posted details of working there "Working with the Leo III computers at SMBP, 1965-67" on my other blog Trapped by the Box.