Whiteboard
Albert Stallion invented whiteboards while working at Alliance in the 1960s. Alliance (now known as PolyVision) produced enameled steel for architectural cladding, but Stallion noted it could also potentially be used as a writing surface. Stallion later left Alliance to form his own whiteboard production company, MagiBoards.
Spectrum (arena)
The Spectrum, along with the Met Center and The Forum, was one of the first sports arenas to have a scoreboard with a messageboard. Furthermore, the messageboards on the Spectrum scoreboard were the first dot matrix screens in pro hockey or basketball, capable of photos, animation, and replays as well as messages. This was replaced in 1986 with ArenaVision, which consisted of six 9-by-12-foot rear-projection videoscreens at the top and a four-sided American Sign and Indicator scoreboard at the bottom. Inside the videoscreens were General Electric projectors located 15 feet away from each screen.