Acronymic devices in atomic clocks and radio telescopes

MASERS

A MASER is a device that was around long before LASERs came into the public consciousness. A MASER (Microwave Amplification by Stimulated Emission of Radiation) is similar to a LASER, but microwaves are emitted rather than light waves. When the storyline for “Star Trek” was being developed, the writers introduced a weapon called a “phaser”, with the name “phaser” derived from PHoton mASER.