Control Panel\Plugboard. 557 Interpreters you could control certain machine functions through the control panel which I called wiring board.

I was never trained on 557, but I remember things like zero print, and significant digits, controlling the stackers and other operations.

The operators set up the control panel depending on what they needed to do. Or the maintenance person could use to test the machine function.

You can see one here on this 557.

Control Panel. 557 Interpreters you could control certain machine functions through the control panel which I called wiring board.

I was never trained on 557, but I remember things like zero print, and significant digits, controlling the stackers and other operations.

The operators set up the control panel depending on what they needed to do. Or the maintenance person could use to test the machine function.