insulate
1960s
13159_7028_transistor_history4
An animated diagram shows the first experiments with an amplifying…
1970s
13160_11730_appalachianpower
A man enters a hardware store and the cashier tells him that his…
1960s
An animated diagram shows the first experiments with an amplifying…
1970s
A man enters a hardware store and the cashier tells him that his…