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Re:Vis: A Vim-Like Text Editor by marchelzo on Thursday April 07, 2016 @12:17PM (#11448458)
What does B/E stand for?
Re:Vis: A Vim-Like Text Editor by ktamura on Thursday April 07, 2016 @01:26PM (#11448975)
They are the utility scripts to start an editor window in Acme. B is async whereas E is sync (so that it can be used for the EDITOR env variable for software like git).

Not sure what they stand for for sure. E is probably editor. B might be buffer?