This old tale was posted by Tim Bruening on alt.humor.puns. It also has been bouncing all over the internet. The author is not known.

A local business was looking for office help. They put a sign in the window, stating the following:

HELP WANTED.
Must be able to type,
Must be good with a computer
Must be bilingual.
We are an Equal Opportunity Employer.

A short time afterwards, a dog trotted up to the window, saw the sign and went … Read the rest...