I believe AT&T was trying to build a "videotex" system based on the NAPLPS protocol which was developed by Telidon in Canada. BYTE Magazine's July 1983 issue w

I believe AT&T was trying to build a "videotex" system based on the NAPLPS protocol which was developed by Telidon in Canada. BYTE Magazine's July 1983 issue was dedicated to videotex: https://archive.org/details/byte-magazine-1983-07/mode/2up https://archive.org/details/byte-magazine-1983-07/mode/2up