up vote 2 down vote. The 'exhaust' meaning of the word enervate is a figurative sense that came in later. The original, now archaic/DSL meaning of enervation is to 'cut the nerve (of)', early 15C. The figurative sense is from the 1550s. enervate: (medicine) To partially or completely remove a nerve.
Lesson Summary. A computer system unit is the enclosure that contains the main components of a computer, typically made of steel or aluminum. It holds all other components together and protects the sensitive electronic parts from the outside elements.
Components. A typical CPU has a number of components. The first is the arithmetic logic unit (ALU), which performs simple arithmetic and logical operations. Second is the control unit (CU), which manages the various components of the computer.