In the mid$-1950$s$,$ psychologist Frank Rosenblatt invented a machine for image classification. This machine looked at images composed of $20$ by $20$ pixels and sorted it into two possible classes $($i$.$e$.,$ an example of rudimentary classification$).$ What was this technology referred to as:

perceptron

galvatron

HAL $($Heuristically programmed ALgorithmic computer$)$

OCR $($optical character recognition$)$