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A situation comedy, usually called a sitcom, is a type of comedy program. Sitcoms were first on radio, before television was invented, but are now on television and are a large part of the programs shown. Sitcoms usually have the same characters in the same places (for example; a home, a workplace, a bar, a city, a town, a barn, a shed, a building, a subway, a strip club, a shop, the mall, in a cult, in space, on earth, on mars, on pluto, on jupiter, on mercury, on saturn, on venus, on the moon, in another milky way, in yet another different milky way, in our Milky way, in another time, in another place, in another world, in another cosmos, in our own space of the universe. ) on every episode.