Apple introduced the Macintosh Centris family in 1993 as its mid-range line, including the Centris 610, 650 and 660AV, before the name was folded into the Quadra range. Each machine played this chime after its startup checks passed, a reassuring sign for users in offices and schools. As classic Mac hardware and emulators were archived online, recordings of the boot sound spread to retro computing communities and sound collections, where it remains a shorthand for early 1990s Apple computing and the moment a vintage system comes alive.