Toshiba Satellite P20-8PW User Manual page 38

The Parallel Port lets you connect a parallel printer, or other devices
including ECP-compatible devices.
The two USB (Universal Serial Bus) Ports allow you to connect USB
peripherals to your computer, such as a printer, keyboard or pointing
device. There are two more USB ports on the right side of your computer.
USB 2.0 is a peripheral expansion standard that supports a data- transfer
rate of up to 480 Mbps. USB peripherals have a single standard for cables
and connectors. The USB standard allows you to install and remove USB
devices while the computer is on. Switching devices without turning off
the computer is called "Hot swapping."
The External Monitor Port is a standard 15-pin VGA port for connecting
an analog display such as a desktop computer monitor.
The DC-IN is where you plug in the AC adapter.
The Fan Vents help cool the computer by letting the internal fans shed
heat more easily.
To prevent possible overheating of the CPU, never block the fan vents.
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