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I don't know if this one was used on closed-captioning, but it was used everywhere else, from early dot matrix printers (Centronics 101, LA30 DECwriter, Facit 4553, Extel 70 teleprinters, Practical Automation printers for receipts and ticket stubs) to electronic signs (on some days at the Summer 1976 Olympics in Montreal, and most notably the zipper at One Times Square in New York from 1971-72 to 1977 when the Reuters news agency operated it). The question is which company originated this (I presume Digital Equipment Corporation) and what numerical code was used for it. It was associated with PDP-8 systems, for sure, and dates as far back as at least 1970.
Below is the character map with octal codes from 040 to 137, plus the type as it looked transmitted through said 11-row high Times Square zipper. Which firm would have used this type for scoreboards such as said Olympics?
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