My thinking is that it is a cryto device. They used such to change keys for encoding and decoding.
Although EAI did a lot of analog stuff, it wasn't uncommon for many different companies to do gov contracts. As an example, during WWII, Lionel Train company made ship's compasses. These couldn't be more different. Dwight ________________________________ From: cctalk <[email protected]> on behalf of Cory Heisterkamp <[email protected]> Sent: Thursday, January 12, 2017 12:10:33 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: What's the rarest or most unusual computer-related item do you own? Given the topic, I have this rather *unique* punch card reader, if you want to call it that. It is marked EAI but that's where the trail turns cold. Perhaps used as a microcode source? All holes are read simultaneously via individual switches. If someone has seen one before, please speak up. -C http://www.radar58.com/reader/IMG_2894.jpg http://www.radar58.com/reader/IMG_2895.jpg http://www.radar58.com/reader/IMG_2896.jpg http://www.radar58.com/reader/IMG_2897.jpg >
