Jimsky's Computer Accessories

Where is the plug a computer into a port on the computer on the Acer Aspire series M?

I only have this computer and I am trying to connect an HP Deskjet 842C to it. The card printer is wide and narrow with two screws at the ends at each end. There is nothing in the back of this team that seems to match this. Am I missing something? Thank you!

You I have a parallel printer. The new computers do not have parallel ports. USB adapters are parallel, but if you have Windows Vista may not have drivers for these old printer.

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