Question

In the late 1950s the ________ was introduced and enabled engineers to create complicated circuitry in a much smaller package.

Answer 1

I believe that the answer to the question provided above is that In the late 1950s the TRANSISTOR  was introduced and enabled engineers to create complicated circuitry in a much smaller package.
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.