What invention led to the development of smaller computers after the 1960s? a. the electronic circuit board b. the internet c. email d. the calculator

Computers before the 1960's were very big and heavy. They were also extremely expensive. The invention of the electronic circuit board by Texas Instruments in the late 1950's made computers smaller because it incorporated all of the larger pieces and hardware necessary for a computer to run into one smaller device.

c- companies fail to take environmental protection into account. i think

a is the final ! : )