Nope. That's not it. By "builders use" I meant I see it in redstone contraptions. It sort of has similar capabilities to ComputerCraft monitor buttons, but is restricted to four horizontally (or I think sixteen in a grid) "buttons" on one face, which are able to activate redstone contraptions, each button functioning similarly to a vanilla button. I think it uses either MFR or ProjectRed channels to accomplish this.
Bus input panel perhaps? From ProjectRed. Lets you send a signal to the corresponding colored cable.
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