Gremlins

thumb|upright|A World War II gremlin-themed industrial safety poster A gremlin is a mischievous fictional creature invented at the beginning of the 20th century originally to explain malfunctions in aircraft, and later in other machinery, processes and their operators. Depictions of these creatures vary widely. Stories about them and references to them as the causes of especially inexplicable technical and mental problems of pilots were especially popular during and after World War II.

American animated television series

novel by Roald Dahl

Zlydzens (Belarusian : Злыдні, and Ukrainian : Злидні) are small, hunchbacked, hazardous creatures in Belarusian and Ukrainian mythology associated with gremlins. These mythological characters often live under the masonry stove.

The Femlin is a character used on the Party Jokes page of Playboy magazine. Created in 1955 by LeRoy Neiman, Femlins became a mainstay of the magazine for more than five decades.

episode of The Twilight Zone (1959 TV series)