I wonder if there ever were 30 to 50 different programs ever written for the Kenbak-1.
Do you know if the original designer ever had a prototype for a card reader for the otherwise superfluous slot in the front panel? I figure it would take about a meter of paper tape to hold an entire memory image, so it's hard to see how that much data could be recorded on a small card given the state of technology at the time.
The HP-65 calculator had a 100 byte magnetic card capability, but it didn't arrive on the scene until 1973 (two years after the Kenbak-1). A few years later, the HP-67 was announced (I bought one), and it used higher density recording to store a full 256 bytes per card.
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