Mark Summerfield

Writing & Software

Mark is an independent programmer, award-winning author, and trainer. Mark is a qualified teacher and graduated with first class honours in Computer Science from the University of Wales Swansea, UK. Prior to starting Qtrac Ltd., he spent many years in the software industry, primarily as a programmer.

Mark Summerfield

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See the Site Map for Mark's commercial and open source software, books, and short-form technical writing.
In view of the EU’s Cyber Resilience Act and an abundance of caution, I have withdrawn all my free software.

For many years Mark used Deja Vu Mono as his monospaced font for coding and xterms. Nowadays he uses Commit Mono. For typesetting and diagrams he used the lout typesetting system, although nowadays for typesetting he uses asciidoctor.