10 most difficult acronyms riddles

BMX began in the early 1970s, when children began racing their bicycles on dirt tracks in southern California, inspired by the motocross stars of the time. Though originally denoting a bicycle intended for BMX Racing, the term "BMX bike" is now used to encompass race bikes, as well as those used for the dirt, vert, park, street, flatland and BMX freestyle disciplines of BMX.

A barcode is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode. Initially, barcodes were only scanned by special optical scanners called barcode readers. Later application software became available for devices that could read images, such as smartphones with cameras.

MIG – ‘MIG’ stands for ‘Metal Inert Gas’ or ‘MAG’ (‘Metal Active Gas’ welding). This is one of the most common welding techniques – and one of the easiest to learn. MIG uses a consumable electrode and an argon-carbon dioxide shielding gas to create strong welds on both thin and thick sheets of metal.

Http is a foundation of the internet. It is a protocol in the client–server computing model."

FIFA is responsible for the organization of football's major international tournaments, notably the World Cup. It was created in Paris in 1904. Today the headquarters of FIFA are located in Zürich, Switzerland.

SPQR (Latin: Senātus Populusque Rōmānus, "The Roman Senate and People" refers to the government of the ancient Roman Republic. It appears on Roman currency, at the end of documents made public by inscription in stone or metal, and in dedications of monuments and public works. The phrase commonly appears in the Roman political, legal, and historical literature.

REM is a phase of sleep during which a sleeper has dreams. It is observed in mammals and birds.

Higher ISO settings allow shorter shutter speeds, which is often desirable as it reduces photo blur caused by camera movement. However, higher ISO also means more noise.

“Ante meridiem” is Latin for “before noon”. Although “AM/PM” is especially common in English-speaking countries, these acronyms come actually from Latin.

Today, the term “CPU” refers to microprocessors, but it is older than them. The computer engineers have used the term "central processing unit" at least since the early 1960s.