The Mackenzie - The nickname of the canned laughter machine used in the television industry to "sweeten" (adding sound effects such as laughter) to a program track to signal to the audience that something funny just occurred.

Most viewers to television come to realize that many jokes are not that funny and that in the end the laugh track is just annoying.

Jackie Gleason explained his opposition to the laugh track by saying "I'd hate to do something on our show (THE HONEYMOONERS) that was a laugh on someone else's."

An early example of a mechanical laugh track, known as "The Laff Box" was created in the mid-fifties by CBS employees, Charley and Bob Douglass.