Universal Serial Bus - Acer TravelMate C100 series User Manual

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To use FIR, position two IR-aware devices such that their IR ports are no
more than one meter apart and offset no more than 15 degrees.
When the two computers are in position, simply begin the data
transfer as you normally would. See your file transfer software for
details.

Universal Serial Bus

The Universal Serial Bus (USB) port is a high-speed serial bus which
allows you to connect and daisy-chain USB peripherals without taking
up precious system resources. Your computer has two ports available.