MSN Messenger was introduced by Microsoft in 1999 and became a major instant-messaging service during the early 2000s. This clip is labeled as the contact-online alert from the 2002 era, when status notifications helped users follow friends joining and leaving the service. The sound later resurfaced in nostalgia compilations, desktop recreations, and social media edits about early internet culture. It remains recognizable because it links a simple electronic cue with the anticipation of seeing a familiar contact appear, much like a modern Discord notification.