the directory the user is currently working in. Typically, when users log in, they are placed in their home directories, which would be their working directory. The command pwd (path of working directory) tells what the user's working or current directory is.
The directory you are currently in. When you log in, you enter your home directory. You can change your working directory with the cd command, and find the name of your current working directory with the pwd command.
many applications assume that the documents and other files that they may require are located in the "working directory". zLaunch allows you to set the working directory for externally launched applications ensuring that all of their components can be found. zLaunch then resets the working directory upon return to Director. Refer to the TechNote, " Path and File Specifications".