A named class that things are sorted into. Its Greek root is TO SPEAK AGAINST - to categorise was first to accuse, and only later to assert.

Short form of directory, and of direction. A named abbreviation rather than a concept.

Environment shortened to its working name — the file and the surroundings a program reads its circumstances from.

Make-directory's command name — the shell word that brings a folder into being.

A bounded body of work with an intended end. Also to throw forward — a project is something cast ahead of where you stand.