A very interesting paper. BCPL was the language used for the Xerox Alto computer, e.g. to build the first graphic WYSIWYG text editor and desktop publishing application.

Martin Richards, How BCPL Evolved from CPL, The Computer Journal, Volume 56, Issue 5, May 2013, Pages 664–670, https://doi.org/10.1093/comjnl/bxs026

Published: 20 March 2012 (not 2021)