Final answer:
The Parallel I/O (PIO) module allows for communication between a computer and external devices. It supports parallel data transfer and can be used for various purposes, such as accessing storage devices or peripheral devices.
Step-by-step explanation:
The Parallel I/O (PIO) module is used to facilitate communication between a computer and external devices. It allows data to be transferred in parallel, meaning multiple bits are transmitted simultaneously.
The PIO module can be used for various purposes, such as reading and writing data to storage devices like hard drives or transferring data to and from peripheral devices like printers or scanners.