Acer 6800 Series - Manual (Page 37)

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Connecting options
Connecting your printer
Your computer supports parallel, serial and USB printers.
To connect a parallel printer, plug the printer cable into the parallel port
(burgundy port) located on the rear panel of your computer.
Note: The printer shown below is for your reference only. Actual
device model may vary by country.
Note: If you are using a serial printer, connect the printer cable
into the serial port located on the rear panel of your computer.
In the same manner, connect a USB printer by plugging the
printer cable into any of the USB ports located on the front and
rear panel.