[zcrackerz]

The word fork has been used for various things in computing long before Github was around. I agree it's a bit overused in this article, but you have the Unix fork command, which creates a copy of the current process and effectively forks the execution. Older Macs of the 80's and 90's used a filesystem that allowed files to have both a data fork and a resource fork; they worked like independent streams to separate program data and embedded resources like images, sounds, etc.