I want to know the answer to the following question:
How many EditDroid systems were ever built?
All the background I'm provided with is that "Later EditDroid experiments borrowed from hard-drive technology of having multiple discs on the same spindle and added numerous playback heads and numerous electronics to the basic jukebox design so that any point on each of the discs would be accessible within seconds.". Is that enough to answer the question?
Answer: no