Think of it as an interpretive teaching language. Can be used for any subject, not just computer literacy. See HPCA2 for an example. This program examines the files described by a source mask and a destination mask. If the time stamp of the source file is newer than that of the destination file, the copy is done.
Visual source compare program.
Displays two source files side by side with differences highlighted in inverse video. Nice for quickly comparing files in context. Program contains help screens. This beeps the terminal if no activity within a certain amount of time. It keeps beeping at 7 second intervals until the name of one of the 50 states in the United States is entered.