![Mood-o-meter](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/1/1a/Mood-o-meter.jpg/revision/latest/scale-to-width-down/180?cb=20130112204125&path-prefix=en)
A mood-o-meter
A mood-o-meter was a tool designed to indicate Human mood. Its scale went from good through fair to bad.
A mood-o-meter was deployed at the Incredible Tales of Scientific Wonder offices in the Arthur Trill Building. (DS9: "Far Beyond the Stars")