Media control symbols are commonly found on both software and physical media players,
remote controls, and
multimedia keyboards. Their application is described in ISO/IEC 18035. The main symbols date back to the 1960s, with the Pause symbol having reportedly been invented at
Ampex during that decade for use on
reel-to-reel audio recorder controls, due to the difficulty of translating the word "pause" into some languages used in foreign markets. The Pause symbol was designed as a combination of the existing square Stop symbol and the
caesura, and was intended to evoke the concept of an interruption or "stutter stop". The right-pointing triangle was adopted to indicate the direction of tape movement during playback. This design choice was straightforward: the arrow pointed in the direction the tape advanced. Over time, this symbol became standardized across various media devices, from cassette players to CD players, and eventually digital interfaces. ==In popular culture==