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The article focuses on the invention of a traffic radar, or better known as the Electromatic Speed Meter developed by a company in Norwalk, Connecticut. A transmitter-receiver unit in a small black box is placed on a fender with its black glass front facing oncoming traffic. The policeman jots down the licenses and descriptions of violators, and radios them to a second police car stationed a mile farther along the highway.

The article reports on the development of gadgets such as radars, sonar, mobile telephone, and magnetic mine at the Bell Telephone Laboratories in the U.S. From the British technology magnetron, the modern radars was developed. The author explores the advantages and enhancements in these technologies.

Focuses on the air defense against atomic attack proposed by scientists Vannevar Bush and Lloyd V. Berkner in the U.S. Advantage and disadvantage of radar; Locations of strategic bases built for the Long-Range Air Army; Revolution in the art of weaponry for air defense.

The article looks a the potential of television (TV) as an advertising medium. Varying comments on the proper use of advertising on TV are presented. According to scientific tests, TV is more effective in advertising than ordinary broadcasting. Research on TV stimulated U.S. scientists and manufacturers to create the radar industry.

The article discusses a ruling issued by the U.S. Court of Appeals on the collision between motorships Pole Star and Santa Anita in 1956. The radar of the Pole Star revealed its distance with Santa Anita but Santa Anita lacks its radar. The captain of the Pole Star went below for much-needed sleep because he anticipated that two ships were on parallel courses and could not collide. But the Pole Star rammed and sank the other ship. The court decided that Pole Star owners must pay the damages because the captain of Santa Anita had used due care compared with Pole Star captain who did not stick to his radar and for merely guessing that the other ship was on a parallel course.