In unix, that is split https://en.wikipedia.org/wiki/Split_(Unix) https://en.wikipedia.org/wiki/Split_(Unix) (and its companion cat). The problem is that on DO

In unix, that is split https://en.wikipedia.org/wiki/Split_(Unix) https://en.wikipedia.org/wiki/Split_(Unix) (and its companion cat). The problem is that on DOS (and Windows), it didn't have the unix philosophy of a tool that did one thing well and you couldn't depend on the necessary small tools being available. Thus, each compression tool also included its own file spanning system. https://en.wikipedia.org/wiki/File_spanning https://en.wikipedia.org/wiki/File_spanning