programming – from Softpanorama ebook "The Orthodox File Manager (OFM) Paradigm" Picture of Vsevolod V. Volkov and Daniel R. Egner (webmaster) web.archive.org/web/20201027035410/http://www.softpanorama.org/OFM/Paradigm/Ch03/volkov_commander.shtml web.archive.org/web/20020824173412/http://www.egner-online.de/vc/en/intro.shtml Vsevolod V. Volkov's original repository in web.archive.org/web/20170514041132/http://vvv.kiev.ua/download/ DOS software Orthodox file managers Assembly language software Ukrainian inventions