| Device Name | Book/Story | Author | Date | 
  
  
      | Gait-Cam A surveillance camera system that analyzes the unique way in which people walk, to identify them.
 | Little Brother | Doctorow | 2008 | 
  
  
      | Galactic Damping Field A vast field of force emanating from the center of the galaxy.
 | Brain Wave | Anderson | 1953 | 
  
  
      | Galactography Geography on a galactic scale.
 | Second Foundation | Asimov | 1953 | 
  
  
      | Galactovue Star display.
 | Citizen of the Galaxy | Heinlein | 1957 | 
  
  
      | Galatea - Virtual Person An entirely artificial creation placed in the mind of the user.
 | Pygmalion's Spectacles | Weinbaum | 1935 | 
  
  
      | Galaxy Superbrain The idea that the galaxy itself is a conscious entity.
 | Short-Wave Madness | Castle | 1939 | 
  
  
      | Games Machine A vast computer system.
 | World of Null-A | van Vogt | 1945 | 
  
  
      | Gansas Migratory birds that fly all the way to the Moone.
 | The Man in the Moone | Godwin | 1638 | 
  
  
      | Garbage Device Autonomous garbage collection device.
 | The Age of The Pussyfoot | Pohl | 1966 | 
  
  
      | Garbage Mine The idea that recycling can spawn entirely new industries.
 | Earth | Brin | 1990 | 
  
  
      | Garbage Screen Use of bits of metal to confuse radar targeting of space stations.
 | Space Tug | Leinster | 1953 | 
  
  
      | Garbage-can Banger An elaborate noise-based weapon.
 | The Zap Gun (Project Plowshare) | Dick | 1965 | 
  
  
      | Gas Giant Large planet consisting primarily of gas with a solid core.
 | Solar Plexus | Blish | 1952 | 
  
  
      | Gas-Accumulators Storage for electricity enough to power a city.
 | Ralph 124c 41 + | Gernsback | 1911 | 
  
  
      | Gate A opening through spacetime to other worlds.
 | The Gate to Xoran | Wells | 1931 | 
  
  
      | Gateway A device that opens a portal to another dimension.
 | Wanderer of Infinity | Vincent | 1933 | 
  
  
      | Gaussrifle Projectiles driven by electromagnetic forces.
 | The Stainless Steel Rat's Revenge | Harrison | 1970 | 
  
  
      | Gauzy A feather-light tent, made of a fabric just one molecule thick.
 | This Immortal | Zelazny | 1965 | 
  
  
      | Gee Using the standard letter designation in physics for gravity.
 | Sacred Martian Pig (Idris' Pig) | St. Clair | 1949 | 
  
  
      | Gee Bath Essentially a waterbed designed to help older or untrained people cope with high acceleration aboard spacecraft.
 | The Mote in God's Eye | Niven (w/J. Pournelle) | 1974 | 
  
  
      | Genejack A genetically-modified human ideally created for menial work.
 | Alpha Centauri | Meier | 1999 | 
  
  
      | General Bodies Tortoise A passenger vehicle genetically engineered from tortoise DNA and controlled by implanted electronics.
 | Sparrowhawk | Easton | 1990 | 
  
  
      | General Intelligence Machine News and information from one device.
 | When the Sleeper Wakes | Wells | 1899 | 
  
  
      | General Products Hull Nearly indestructible outer skin for spaceships; pick your hull size and put what you want inside.
 | Neutron Star | Niven | 1966 | 
  
  
      | General Strike of the Robots All over the world, robots cease their labors.
 | Rex | Vincent | 1934 | 
  
  
      | Generate New Phone Number A software program that creates a new phone number for each call.
 | Press Enter | Varley | 1984 | 
  
  
      | Generation Ship A spacecraft that carries a complete social group over many years.
 | Star Ship | Tubb | 1955 | 
  
  
      | Genetic Ark Enormous, multi-habitat enclosed spaces, used to conserve the animal gene pool.
 | Earth | Brin | 1990 | 
  
  
      | Genetic Engineering Direct manipulation of genetic material
 | Dragon's Island | Williamson | 1951 | 
  
  
      | Genoprinter A device that does a 'live capture' of a biometric skin sample.
 | The Ophiuchi Hotline | Varley | 1977 | 
  
  
      | Geodesic Inflexors Propulsion provided not by pushing against matter, but against spacetime.
 | Star of Dreams | Williamson | 1941 | 
  
  
      | Geodynes Spacecraft propulsion that pushes against the very fabric of space itself.
 | The Cometeers | Williamson | 1936 | 
  
  
      | Geofractor Device provides instantaneous teleportation of selected objects over vast distances.
 | One Against The Legion | Williamson | 1939 | 
  
  
      | Geofractor Shield Protects the bearer against unwanted geofractor use.
 | One Against The Legion | Williamson | 1939 | 
  
  
      | Geometric Modeling The first recorded use of geometric figures to directly represent, or model, living beings.
 | Gulliver's Travels | Swift | 1726 | 
  
  
      | Geopeller An atomic powered, miniaturized means of propulsion.
 | One Against The Legion | Williamson | 1939 | 
  
  
      | Geosynchronous Satellite A communications satellite that appears to "hover" over one spot on the earth's surface; it goes around the earth in twenty-four hours.
 | V2 for Ionospheric Research | Clarke | 1945 | 
  
  
      | Geotect A person who creates landforms and physical environments
 | The Diamond Age | Stephenson | 1995 | 
  
  
      | Geriatric Rooming-House An apartment building with rooms built especially with the very senior citizen in mind.
 | Galactic Pot-Healer | Dick | 1969 | 
  
  
      | Gesture-Controlled Device An electronic device that is controlled by hand gestures.
 | The Hitchhiker's Guide to the Galaxy | Adams | 1979 | 
  
  
      | Gesturing Robot A robot that uses gestures to communicate.
 | Robbie (Strange Playfellow) | Asimov | 1940 | 
  
  
      | Ghola A living, functioning person who is regrown or recreated from the tissues of a dead person.
 | Dune Messiah | Herbert | 1969 | 
  
  
      | Ghost Trap Device for capture and temporary storage of ectoplasmic entities.
 | Ghostbusters | Ramis | 1984 | 
  
  
      | Ghostsmoke An advertisement projected onto a fine mist.
 | The Ophiuchi Hotline | Varley | 1977 | 
  
  
      | Ghostwheel A sentient computer partially built with magic.
 | Blood of Amber | Zelazny | 1986 | 
  
  
      | Giant Flat Panel Display Movie screen-sized flat panel display for live televised images.
 | The Shape of Things To Come | Wells | 1936 | 
  
  
      | Gigagnostotron Enormously powerful computing device.
 | The Cyberiad: Fables for the Cybernetic Age | Lem | 1965 | 
  
  
      | Gillfluid Breathable fluid that provides oxygen to the lungs, allowing greater pressure on the body.
 | The Algebraist | Banks | 2004 | 
  
  
      | Glass Bees Walnut-sized flying automata.
 | The Glass Bees | Junger | 1957 | 
  
  
      | Glass Dome Protective cover for cities.
 | A Modern Utopia | Wells | 1905 | 
  
  
      | Glass Pistol A clear glass gun that fires poisoned splinters.
 | A Martian Odyssey | Weinbaum | 1934 | 
  
  
      | Glassite A transparent material of great strength.
 | Brigands of the Moon | Cummings | 1930 | 
  
  
      | Global Climate Control Adjust the Earth's axis so the seasons are more temperate and uniform.
 | A Journey In Other Worlds | Astor IV | 1894 | 
  
  
      | Globular Glass Helmet A bowl-shaped space helmet.
 | Murder on the Asteroid | Binder | 1933 | 
  
  
      | Glowglobe Floating spherical light bulb with organic energy source.
 | Dune | Herbert | 1965 | 
  
  
      | Glowstone A mineral that absorbs light by day and emits it by night.
 | Dying of the Light | Martin | 1977 | 
  
  
      | Glow-Worm Living Alternated work, play and slumber without long periods of sleep.
 | In the Deep of Time | Lathrop | 1897 | 
  
  
      | Gnome A person who requires so much life support, they are built into the chair.
 | Millennium | Varley | 1983 | 
  
  
      | Gnostotron Computing device capable of producing an informational model of absolutely everything in existence.
 | The Cyberiad: Fables for the Cybernetic Age | Lem | 1965 | 
  
  
      | Goat/Spider Silk High tensile strength fibers from - goats.
 | Oryx and Crake | Atwood | 2003 | 
  
  
      | Gobathian An alien medical technology that enables full body healing in the event of traumatic injury.
 | Time is the Simplest Thing | Simak | 1961 | 
  
  
      | Go-Buggy A ground-only vehicle.
 | The Godmakers | Herbert | 1972 | 
  
  
      | Gogglelike Televisors A screen technology placed very close to the eyes.
 | The Robot and the Lady | Wellman | 1938 | 
  
  
      | Golden Lights Another unusual use of the suspensor field; lights are suspended in it.
 | Dune | Herbert | 1965 | 
  
  
      | Golden Ray of Synchronized Vibrations Disrupts matter by hurling electrons out of their energy states and scattering them.
 | The Return of the Murians | Schachner | 1936 | 
  
  
      | Golden Shuttles (Mechanical Mice) Very small robots with an appetite for watch parts.
 | The Mechanical Mice | Hugi | 1941 | 
  
  
      | Gold-Fish-Bowl World An artificial water planet.
 | Star Maker | Stapledon | 1937 | 
  
  
      | Gom Jabbar A needle with deadly poison, used to test for humans.
 | Dune | Herbert | 1965 | 
  
  
      | Gourmet Space Cuisine The finest in French cuisine, in outer space.
 | From the Earth to the Moon | Verne | 1867 | 
  
  
      | Governing Keyboard A remote-controlled robot responds to keyboard commands.
 | The Threat of the Robot | Keller | 1929 | 
  
  
      | Government Data Transparency The idea that all of the information available to the government should be posted online and be easily accessible to everyone.
 | The Shockwave Rider | Brunner | 1975 | 
  
  
      | Government Lethal Chamber A legal suicide booth.
 | The Repairer of Reputations | Chambers | 1895 | 
  
  
      | Government Machine The automata that constitute the entire government, all in one building.
 | Mechanocracy | Breuer | 1932 | 
  
  
      | GPP Genuine People Personalities Giving mechanisms their own unique affect.
 | The Hitchhiker's Guide to the Galaxy | Adams | 1979 | 
  
  
      | GPS Sunglasses Sunglasses that contain both global positioning system components and cell phone services.
 | All Tomorrow's Parties | Gibson | 1999 | 
  
  
      | Graffiti-Eating Finish A wall covering that  maintained itself, eating any graffiti placed on it.
 | All Tomorrow's Parties | Gibson | 1999 | 
  
  
      | Graluz A contained, concealed breeding pond for the frog-like Gowachin.
 | The Dosadi Experiment | Herbert | 1977 | 
  
  
      | Grantline Comptometer Key-driven computer/calculator that easily solves even calculus problems.
 | Beyond the Stars | Cummings | 1928 | 
  
  
      | Granton Motor Spacecraft propulsion system based on gravital radiation.
 | Into the Meteorite Orbit | Kelly | 1933 | 
  
  
      | Grapple Tracks A means of automating the process of parking and releasing passenger vehicles from a parking garage.
 | The Dosadi Experiment | Herbert | 1977 | 
  
  
      | Grapple-Ray A version of the tractor beam idea.
 | Exit From Asteroid 60 | James | 1940 | 
  
  
      | Grass Carpet An indoor home or office floor covering - living grass.
 | The Sirens of Titan | Vonnegut, Jr. | 1959 | 
  
  
      | Gravanol A medicine or supplement that helps astronauts deal better with high accelerations.
 | QRM - Interplanetary | Smith | 1942 | 
  
  
      | Gravital Unit Device that maintains Earth-comparable gravity on an asteroid.
 | Accidental Flight | Wallace | 1952 | 
  
  
      | Gravitation Paralysis Dread illness of space travelers striking when changing from very weak to very strong gravities.
 | The World With A Thousand Moons | Hamilton | 1942 | 
  
  
      | Gravitation Screen Shields a spacecraft from the gravity of a planetary body.
 | On The Martian Way | Bishop | 1907 | 
  
  
      | Gravitational Disks Maintain your footing on those low-gravity celestial bodies.
 | Revolt on Io | West | 1940 | 
  
  
      | Gravitational Wave Viewer A device used to see at astronomical distances.
 | Two Planets | Lasswitz | 1897 | 
  
  
      | Gravitic Relating to gravity.
 | A Question of Salvage | Jameson | 1939 | 
  
  
      | Gravitic Generator A device that produces an artificial gravity field.
 | Meddler's Moon | Smith | 1947 | 
  
  
      | Gravitic Lift An elevator with no visible means of support.
 | Prelude to Foundation | Asimov | 1988 | 
  
  
      | Gravitic Repulsion Elevator The elevator was of the new sort that ran by gravitic repulsion.
 | Foundation | Asimov | 1951 | 
  
  
      | Gravitics The science of using gravity as a technology.
 | Tricky Tonnage | Jameson | 1944 | 
  
  
      | Gravito-Statoscope An instrument used to detect the gravitational influences on a space ship.
 | The Emperor of the Stars | Schachner (w. AL Zagat) | 1931 | 
  
  
      | Gravity Assist Using the gravity and orbital speed of a celestial body to change speed and course of a spacecraft.
 | Brigands of the Moon | Cummings | 1930 | 
  
  
      | Gravity Beam An conical attractive ray, it pulls ships to their doom.
 | Wandl, The Invader | Cummings | 1932 | 
  
  
      | Gravity Belt Adds 'weight' for walking on asteroids.
 | Venus Mines, Incorporated | Schachner (w. AL Zagat) | 1931 | 
  
  
      | Gravity Centrifuge Used in low gravity environments to build up muscle for visits to Earth, or other high gravity worlds.
 | Space Cadet | Heinlein | 1948 | 
  
  
      | Gravity Detector A device capable of detecting the gravitational field of a distant mass.
 | The Lunar Chrysalis | Gallun | 1931 | 
  
  
      | Gravity Drive A spaceship propulsion method that uses gravity or gravity waves.
 | Star Ship | Anderson | 1950 | 
  
  
      | Gravity Lens An optical lens created using the lightbending properties of gravity.
 | Protector | Niven | 1973 | 
  
  
      | Gravity Neutralizers The force of gravity is suspended!
 | Pirates of Space | Barry | 1931 | 
  
  
      | Gravity Neutralizing Disks Two plates between which Earth's gravitational influence is cancelled out.
 | Fessenden's Worlds | Hamilton | 1937 | 
  
  
      | Gravity neutralizing paint Paint or coating that neutralized the effects of gravity on whatever it was painted on.
 | Last of the Masters | Dick | 1954 | 
  
  
      | Gravity Nullification (Gravity Screen) Gravity annulled in its entirety in a small area.
 | Ralph 124c 41 + | Gernsback | 1911 | 
  
  
      | Gravity Nullifier Shields a large object from the effect of gravity.
 | The Sky Maniac | Juve | 1929 | 
  
  
      | Gravity Planer Device that creates a gravity field.
 | The Warriors | Niven | 1966 | 
  
  
      | Gravity Port Used for refueling.
 | Shadow Over Venus | Long, Jr. | 1946 | 
  
  
      | Gravity Train An underground railway system that utilizes gravity for acceleration.
 | The Ophiuchi Hotline | Varley | 1977 | 
  
  
      | Gravity Tube A special passage way that eases the movement of material within a ship.
 | Chindi | McDevitt | 2002 | 
  
  
      | Gravity Web Device for limiting the extent to which a person is subject to gravitational attraction.
 | Whipping Star | Herbert | 1969 | 
  
  
      | Gravity Well If you visualize spacetime as a flat, elastic plane, a planet will deform it, and it sits at the bottom of its own hole.
 | Life Cycle | Anderson | 1957 | 
  
  
      | Gravity Whip A roller coaster designe to provide riders with a 'zero G' experience.
 | Dream Park | Niven (w/S. Barnes) | 1981 | 
  
  
      | Gravity-assisted Subway The fastest way between continents (that does not entail leaving the ground).
 | A World Out of Time | Niven | 1976 | 
  
  
      | Gravity-Plates Reliable, controllable gravity force.
 | The Bluff of the Hawk | Gilmore | 1932 | 
  
  
      | Gravity-Polarized Explosive (TDX) A chemical explosive that acts at an angle to the local gravitational field.
 | Cities in Flight | Blish | 1957 | 
  
  
      | Gravity-Screen A device that shields an object from the effects of gravity.
 | Crashing Suns | Hamilton | 1928 | 
  
  
      | Gravity-Simulator Harness Device that simulates gravity's effect on muscles to keep in shape while in space.
 | Space Tug | Leinster | 1953 | 
  
  
      | Gravograph A graphical representation of gravitational fields.
 | The Sargasso of Space | Hamilton | 1931 | 
  
  
      | Great Ear An electronic telepathic listening device that monitors thousands of people simultaneously.
 | Our Friends From Frolix 8 | Dick | 1970 | 
  
  
      | Green Bullet A very compact (for 1950) radio transceiver, worn in the ear like a hearing aid.
 | Fahrenheit 451 | Bradbury | 1953 | 
  
  
      | Green Guk Algae that produces essential oxygen as a byproduct.
 | The Beat Cluster | Leiber | 1961 | 
  
  
      | Grill-Screen Adaptor Approved General Electronics Corporation solution for bomb shelters, in response to Soviet bore-pellets.
 | Foster, You're Dead | Dick | 1955 | 
  
  
      | Grip Shoes Shoes with velcro soles used to walk in weightless environments.
 | 2001: A Space Odyssey | Clarke | 1968 | 
  
  
      | Grok To understand fully; become one with (from the Martial verb "to drink").
 | Stranger in a Strange Land | Heinlein | 1961 | 
  
  
      | Groundcar (or Ground Car) A non-skimming, non-flying vehicle.
 | Galactic Patrol | Smith | 1937 | 
  
  
      | Groundhog Not a space professional.
 | Waldo | Heinlein | 1942 | 
  
  
      | Groundling A person who does not fly, especially into space.
 | Exiles of the Moon | Schachner (w. AL Zagat) | 1931 | 
  
  
      | Ground-to-Orbit Ferry A kind of space shuttle craft.
 | The Moon is a Harsh Mistress | Heinlein | 1966 | 
  
  
      | Group Ego A group mind; a single entity that shares a number of bodies.
 | Methuselah's Children | Heinlein | 1941 | 
  
  
      | Group Mind A shared consciousness between a number of individuals.
 | Last and First Men | Stapledon | 1930 | 
  
  
      | Guard Robot Early reference to a robot performing the functions of a security guard.
 | The Hood Maker ('Immunity') | Dick | 1955 | 
  
  
      | Guide-Beam A wireless means of controlling and directing the movement of a passenger vehicle.
 | Time Pawn | Dick | 1954 | 
  
  
      | Guided Missile Control Station An orbital missile base.
 | Between Planets | Heinlein | 1951 | 
  
  
      | Gum Tree A huge tree that lashed out with a mind of its own.
 | Symbiotica | Russell | 1943 | 
  
  
      | Gundarium A very sturdy, high-tensile composite.
 | Mobile Suit Gundam | Tomino | 1979 | 
  
  
      | Gynoid A female android.
 | Divine Endurance | Jones | 1984 | 
  
  
      | Gyro Two-Wheeled Truck A gyroscopically-stabilized truck with just two wheels.
 | The Sign of the Tiger | Nourse (w/Meyer) | 1958 | 
  
  
      | Gyrocab A flying taxi.
 | You Are Forbidden! | Shelton | 1947 | 
  
  
      | Gyrocar A two-wheeled, self-balancing automobile.
 | Two Boys in a Gyrocar the story of a New York to Paris motor race | Brown | 1911 | 
  
  
      | Gyrocar (Gyro) A gyroscopically stabilized car; a one-wheeled vehicle.
 | The Ring | Anthony (w/R. Margroff) | 1969 | 
  
  
      | Gyrocar Monorail A self-balancing vehicle.
 | The Anarch | Jameson | 1944 | 
  
  
      | Gyrocars with Photo-Electric Braking Force the tires into maximum contact with the road, then use photo-electric sensors to control braking and turns.
 | Photo Control | Brown | 1934 | 
  
  
      | Gyrocosmically Stabilized Interplanetary Rocket A mouthful, perfect for trips to the larger asteroids.
 | Buck Rogers, 2430 AD | Nowlan (w/D. Calkins) | 1929 | 
  
  
      | Gyro-Hat Hidden in a top hat, this device cures staggering and reeling, for whatever reason.
 | An Experiment in Gyro-Hats | Butler | 1926 | 
  
  
      | Gyroscope Seats Your best bet for remaining at the right angle to the force of acceleration.
 | The Black Star Passes | Campbell | 1930 | 
  
  
      | Gyrotomic A small gyrostabilized hovercraft.
 | Ra For The Rajah | Peterson | 1938 |