https://github.com/davepinch/pinchy.cc/blob/master/content/topics/conspiracy/gateway-process/analysis/sections/34/34-6-09.md
MS-DOS was heavily influenced by TOPS-10. Identical elements include three characters long file extensions, several standard extensions (e.g., EXE, TXT), the asterisk (*) as a wildcard, the usage of the slash (/) as a switch separator and more.