laptop computer: rear view
S-Video output 
Connector that links a computer to a video output peripheral (television set, video projector, VCR).
FireWire port 
High-performance connector that conforms to the FireWire standard; it is used to link high-speed peripherals (camcorder, digital camera).
infrared port 
Device that uses infrared signals to exchange data with a device with a similar port (a network access transmitter-receiver, computer, printer).
internal modem port 
Connector used to attach the internal modem (a two-way digital signal changing device) to a telephone line.
video port 
Connector used mostly to connect the computer to an external monitor.
USB port 
Connector used to link several USB standard peripherals simultaneously; it is faster than serial and parallel ports.
Ethernet port 
Connector conforming to the Ethernet protocol; it is used to connect a computer to a local area network or another computer for file sharing.
power adapter port 
Connector used to attach the power adapter to the computer.
cooling vent 
Openings allowing air to enter to cool the computer’s internal components.