Directory : Equivalent to a folder on a file system. "Directory" sounds more nerdy.
Root Directory : The top folder of any given server "context". On your local file system, the root directory is the top directory on your hard drive. For a website, it's the top directory under a domain name.
Present Working Directory : Your current location in the file system.
Relative File Path
: A partial path (there is no leading slash) that is relative to the working directory. Example: images/pic1.png
Absolute File Path
: A full path (starts with a leading slash) that points to the same location in a file system regardless of the current working directory. The leading slash make the path relative to the root
directory. Example: /images/pic1.png
Warning: Absolute and relative paths have a slightly different definition in the context of HTML links. Absolute paths are full URLs with protocol and domain information. Relative paths are all others, including links that start with a leading slash. {: .notice--warning}