Designed a computer (Ferranti Argus 400, one of the earlies Integrated Circuit designs) in 1963 and worked on many other hardware designs including a magnetic tape controller. Rhis was for Industrial Process Control.

Led the OS kernel team at Computer Technology in 1970s written in Assembler. Designed a Dealing/Trading room in 1980s for financial trading.

Worked on a variety of networks with a strong emphasis on security until I finally retired 1n 2018.

Written software in many different languages, mainly PL/M, C,C++, C#