A term coined in the 1970s. It refers to an experimental device, actually a thin plastic board, used in prototyping electronic circuits where components such as integrated circuits, transistors and resistors are "plugged" into the board. Because a breadboard does not require soldering, it makes for easy use in creating temporary prototypes and experimenting with circuit design in the laboratory. The DoD hierarchy of DoD Technology Levels (TRL) considers technology that is "breadboarded" in the lab as either TRL 3, 4, or 5.
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