allegro

Allegro is an Italian musical term used as a tempo marking indicating a lively, brisk pace. In musical notation, allegro indicates a faster tempo than andante, but slower than presto; it can appear as a standalone tempo or as part of a phrase like allegro con brio. Common practice places allegro roughly in the range of 120 to 168 beats per minute, though exact speed depends on the composition and performer.

In computing, Allegro refers to a cross-platform software library used for video game development. It provides modules for graphics, input, audio, timers, and more, and supports multiple operating systems. It originated in the 1990s and is available as free/open-source software, with ongoing community maintenance.

Allegro is also the name of a major Polish online marketplace, Allegro.pl, founded in 1999, which operates as a platform for buying and selling new and used goods; it is one of the largest e-commerce platforms in Poland.

Allegro MicroSystems, Inc. is a U.S.-based manufacturer of sensor devices, notably Hall-effect sensors and other magnetic sensors used in automotive, industrial, and consumer applications.