Windows 10 build 10240 was the release-to-manufacturing build that preceded the operating system's public launch in July 2015, and its system sounds became familiar to millions of desktop users almost immediately. The message notification tone was one of the default alerts heard whenever a new message arrived, so it quickly entered the shared vocabulary of computer users. Shared later on soundboards and in short videos, it now works as instant shorthand for an incoming message, even for viewers who no longer use Windows 10 every day.