The mind - reading device is frequently used in science fiction. It allows one character to access the thoughts of another. There's also the energy sword. It's a melee weapon that uses some form of energy, often looking very cool in combat scenes. And don't forget the artificial intelligence console. It serves as an interface between humans and advanced computer systems in many science fiction settings.
Well, the force field generator is used often. It can create a protective shield around a person, place or thing. Then there's the holographic projector. It can display three - dimensional images, which is used for various purposes like communication or entertainment in science fiction. Also, the time - travel device is a popular one. It enables characters to journey through time, whether to the past or the future, which always leads to some very interesting storylines.