Sci-fi vehicles are a popular trope in science fiction, often used to transport characters from one place to another. The most common sci-fi vehicles are the POD, a three letter acronym for Personal Orbital Device, a small spacecraft used for short trips; the STARSHIP, an eight letter acronym for Spacecraft Technology And Resources for Interstellar Mission and Propulsion, a large spacecraft used for long distance travel; and the UFO, a three letter acronym for Unidentified Flying Object, a mysterious craft of unknown origin.