A nerve block is an anesthetic or anti-inflammatory injection targeted toward a certain nerve or group of nerves to treat pain. The purpose of the injection is to turn off a pain signal coming from a specific location in the body or to decrease inflammation in that area.
- Components, Definition & Examples. Computer hardware is the collection of physical parts of a computer system. This includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others. Computer hardware is what you can physically touch.
The central processing unit is the most important hardware component of a computer system. It is also known as the CPU, the central processor or instruction processor, and the main microprocessor in a microcomputer. computer is system of hardware devices organized according to the following system functions. 1  Input. 2  The input devices of a computer system include keyboards, touch screens, pens, electronic mice, optical scanners, and so on.