Wang 320 SE
For displaying 10x10 digits, 9 decimal places and the leading sign the device
needs only 14 data lines. Hence Wang already implemented multiplexing.
The punch card contains a program for computing sinus values. It actually simulates keyboard input. The display shows the result for
whereas the last four positions are inaccurate.
The picture below shows some details from the inner life with keyboard and nixie tubes, glow lamps (for showing the comma) and transistors for amplifying. The switches in the background are part of the keyboard.