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A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons. The term \"laser\" originated as an acronym for Light Amplification by Stimulated Emission of Radiation. Application - When lasers were invented in 1960, they were called \"a solution looking for a problem\". Since then, they have become ubiquitous, finding utility in thousands of highly varied applications in every section of modern society, including consumer electronics, information technology, science, medicine, industry, law enforcement, entertainment, and the military. The first use of lasers in the daily lives of the general population was the supermarket barcode scanner, introduced in 1974. The laserdisc player, introduced in 1978, was the first successful consumer product to include a laser but the compact disc player was the first laser-equipped device to become common, beginning in 1982 followed shortly by laser printers. Some other uses are: * Medicine: Bloodless surgery, laser healing, surgical treatment, kidney stone treatment, eye treatment, dentistry * Industry: Cutting, welding, material heat treatment, marking parts, non-contact measurement of parts * Military: Marking targets, guiding munitions, missile defence, electro-optical countermeasures (EOCM), alternative to radar, blinding troops. * Law enforcement: used for latent fingerprint detection in the forensic identification field * Research: Spectroscopy, laser ablation, laser annealing, laser scattering, laser interferometry, LIDAR, laser capture microdissection, fluorescence microscopy * Product development/commercial: laser printers, optical discs (e.g. CDs and the like), barcode scanners, thermometers, laser pointers, holograms, bubblegrams. * Laser lighting displays: Laser light shows * Cosmetic skin treatments: acne treatment, cellulite and striae reduction, and hair removal.