MSNTV 2 was Microsoft's later internet television set-top box, a successor to WebTV that let households browse the web and check email through their television. Its power-on sound was the brief electronic signal that accompanied the box starting up, rather than a musical theme or spoken greeting. As those boxes disappeared from living rooms, the tiny chime survived mainly as a curiosity for retro computing enthusiasts, who share short device sounds to document forgotten hardware. It remains in use because it instantly signals an era when the television itself was the family computer.