I will attach the answers below. The number of characters is beyond the default characters required.
Power supply unit, central processing unit (CPU), hard disk drive (HDD), RAM modules, motherboard, video card, sound card etc.
Look for the lock symbol in the search section of your window/browser.
Government weapon in cold war
* Main Electron a component- vacuum tube.
* Main memory- Magnetic drums and magnetic tapes.
* Programming language- Machine language.
* Power- Consume a lot of electricity and generate a lot of heat.
* were expensive to operate
