The WorldKey was a computer interface kiosk built by Bell Laboratories, which originally lived in the post-show of Spaceship Earch but was later moved to Communicore closer to EPCOT's Computer Central itself. The "touchscreens" used a grid of laser sensors and coordinates to create the illusion of a responsive screen, and the visuals were created by a combination of computer text and graphics with pre-rendered video and animation stored on laserdisk. WorldKey monitors took information back and forth to the Computer Central, and allowed guests to learn more about the park and get current updates on rides, as well as connect to a call center.
My favorite part of the WorldKey system is Bit! He's a little pixel (a single bit!) with goofy animated hands that bring things up on your screen with all that squash and stretch animation charm. Bit was made to be a friendly face for those who were new to the idea of computers, and his classic animation style was nostalgic and inviting. There isn't much about this guy and no high-quality recordings of his Worldkey segments exist, but he is one of my favorite short-lived characters to come out of this EPCOT era.
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Ultimately, the laserdisk system was too expensive and time consuming to update with new footage and information. Since text-based info could be easily added to the computer's display, the additions and subtractions of new rides, shows, even whole pavillions would be added as footnotes in text while the videos themselves grew out of date. The system was scrapped in 1999.