Some operating systems (like UNIX) let you receive input from devices other than terminals and disk files and let you use a name (like a filename) to reference them. You redirect input from these devices exactly like files. For more information, see Input from files .

You can read the contents of a directory using the OS–DIR option of the INPUT FROM statement. For more information on reading the contents of a directory, see Readingthe contents of a directory.

You can reset any input source to the terminal using the TERMINAL option of the INPUT FROM statement. For more information, see Receiving input from multiple sources .