VRML - Virtual Reality Modeling Language. I remember a lot of talk. It was going to be big on the 1990s web but then nothing really happened. Quoting Wikipedia

VRML - Virtual Reality Modeling Language. I remember a lot of talk. It was going to be big on the 1990s web but then nothing really happened. Quoting Wikipedia: "VRML has never seen much serious widespread use.[18] One reason for this may have been the lack of available bandwidth.[19] At the time of VRML's popularity, a majority of users, both business and personal, were using slow dial-up Internet access." https://en.wikipedia.org/wiki/VRML https://en.wikipedia.org/wiki/VRML