Since it is located inside of your computer, you can not see it. There is usually a light on the front of the computer which shows when your hard drive is being accessed. A hard drive permanently stores all the data and programs in your computer. When you save something on a computer, you usually save it to the computer's hard drive. A Port allows a PC to communicate with external devices like a printer or a mouse.
Ports can send and receive information.
A port is a physical component of a PC that devices plug into, either directly or via an adapter. The parallel port referred to as LPT1 is the port used primarily for printing. The LPT2 and LPT3 ports are ports that can connect to printers on a network.