Point-to-point construction
"Point-to-point construction is the way most electronics circuits were constructed before the 1950s. Point-to-point construction is still used to construct prototype equipment with few or heavy electronic components.
The crucial invention was soldering. In soldering, an alloy of tin and lead, or later bismuth and tin, is melted and adheres to other, nonmolten metals, such as copper or tinned steel. Solder makes a good electrical and mechanical connection.
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