Gravity neutralizing paint
Paint or coating that neutralized the effects of gravity on whatever it was painted on.

Last of the Masters (1954)

Great Ear
An electronic telepathic listening device that monitors thousands of people simultaneously.

Our Friends From Frolix 8 (1970)

Grill-Screen Adaptor
Approved General Electronics Corporation solution for bomb shelters, in response to Soviet bore-pellets.

Foster, You're Dead (1955)

Guard Robot
Early reference to a robot performing the functions of a security guard.

The Hood Maker ('Immunity') (1955)

Guide-Beam
A wireless means of controlling and directing the movement of a passenger vehicle.

Time Pawn (1954)

Hammer - weapon of AIs
Flying blunt trauma weapon remote-controlled by an artificially intelligent computer.

Vulcan's Hammer (1960)

Hand Wave Control
Control an electronic or other device with gestures.

Solar Lottery (1955)

Handicloset - self-organizing
A self-organizing closet

The Zap Gun (1965)

Histo-Research - best possible evidence
Historical research using a time machine.

The Meddler (1954)

Holo-Cube
A very large holographic display, that a person could walk into.

A Scanner Darkly (1977)

Holo-Printing
Errors introduced in data storage media when recording under improper conditions.

A Scanner Darkly (1977)

Holo-Scanner
A small portable device that acquired holographic surveillance images.

A Scanner Darkly (1977)

Homeopape - news just you can use
A automated device that produces a newspaper without human assistance.

Ubik (1969)

Homeostatic Newspaper - a homeopape
An autonomous news-gathering and publishing entity; abbreviated as homeopape.

If There Were No Benny Cemoli (1953)

Homotropic News Vending Machine
An autonomous news-selling robot, that was able to specifically seek out human beings.

The Game Players of Titan (1963)

Housefly Monitor - flies with sensors
A living fly that is outfitted with sensors for surveillance work.

Lies, Inc. (1964)

Hubrizine
A drug that brings about greater alertness and cheerfulness.

We Can Build You (1972)

Human Quarter
A ghetto for human beings; in this case, in a world of robots.

James P. Crow (1954)

Hypno-Motor Control
A means of controlling the body remotely, cutting off the need for local control (ie, by your mind).

Sales Pitch (1954)

Ident Darts -track your brain
Unmanned aerial vehicles (UAVs) that track individuals.

The Electric Ant (1969)