• Service Clerks – Sell stamps and postage, help people pickup packages and assist with other services such as passports.
• Mail Sorters – Physically sort the mail to go to the correct place. As automation has become more common, some of these people now operate the sorting machines.
• Mail Carriers – Deliver the mail. In densely populated areas this is done on foot. In urban areas the carriers often use a mail truck and in rural areas carriers drive their own vehicles.

The phrase wasn’t very often used until a spate of workplace violence incidents by postal workers in the late 1980s made headlines. The incidents also led to the coining of the phrase going postal.

Humour or humor is the tendency of particular cognitive experiences to provoke laughter and provide amusement. Many theories exist about what humor is and what social function it serves. People of all ages and cultures respond to humour. The majority of people are able to be amused, to laugh or smile at something funny and thus they are considered to have a “sense of humor”.