3 ms·
ed is a derivative of QED, specifically Ken Thompson's versions for CTSS and Multics that added regular expressions. ¹ https://en.wikipedia.org/wiki/QED_(text_
by kps 4y ago
ed is a derivative of QED, specifically Ken Thompson's versions for CTSS and Multics that added regular expressions.
¹ https://en.wikipedia.org/wiki/QED_(text_editor) https://en.wikipedia.org/wiki/QED_(text_editor)