AT&T Archive on YouTube

AT&T's official YouTube page includes an incredible number of educational videos from their archive including work by Jim Henson and Saul Bass.

via Prosthetic Knowledge

The Viewtron System and Sceptre Videotex Terminal (1983)

The Hello Machine

Microelectronics Video Disc Exhibit

Music in Motion

Crystal Clear

Lightwave

Bottle of Magic

The UNIX Operating System

Telezonia

Now You Can Dial

Principles of the Optical Maser

Genesis of the Transistor