Acer Extensa 5610 - Manual (Page 73)

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Universal Serial Bus (USB)
The USB 2.0 port is a high-speed serial bus which allows you to connect USB
peripherals without taking up precious system resources.
IEEE 1394 port
The computer's IEEE 1394 port allows you to connect to an IEEE 1394-
compatible device like a video camera or digital camera. See your video or
digital camera's documentation for details.