I am looking at the Bipolar junction transistor, but I cannot seem to correlate with how the design would work for the CPU in terms of 0 and 1s. I am looking mainly at the transistor diagram from Wikipeida https://en.wikipedia.org/wiki/Transistor. Can someone tell me what Vcc, Vin, and Vout are as well as how they are incorporated into the CPU design. You have voltage input from base which controls the flow of a larger current from collector to emitter thanks to the Semiconductor Physics but you would have to manually control Vin for the base supply voltage to turn the larger current on or off as 0 and 1s. Do you use logic gates to control these transistors? Why would modern electronic device needs a few million of these transistors and how are they paired, in a tree structure? I know my questions seem kind of vague but if someone can enlighten me with the answer it would be cool. After all a few million of these transistors fit into a computer in the present day.