<P> Defines the terminal device (for example, COM1) to use for input and output . </P> <P> Displays the system date and prompts the user to enter a new date . Complements the TIME command . </P> <P> A very primitive assembler and disassambler . </P> <P> The command has the ability to analyze the file fragmentation on a disk drive or to defragment a drive . This command is called DEFRAG in MS - DOS / PC DOS and diskopt in DR - DOS . </P>

The attrib command has which one of the following functions