Computer hardware are the component devices that are the building blocks of personal computers. These are typically installed into a computer case, or attached to it by a cable or through a port. In the latter case, they are also referred to as peripherals.

Computer fundamental all physical parts of the computer (or everything that we can touch) is known as hardware. All of the components of a computer system can be summarised with the simple equations, fundamentals help you to understand this concept.

Most personal computers operate as stand alone machines, and their only connection to another system is connecting to the Internet. If that connection is through a dial-up account using the modem, there is no need for a LAN card.

GSM stands for Global System for Mobile Communications. Just like computers, mobile phones have evolved over time. There were first generation mobile phones inthe 70s, there are 2nd generation mobile phones in the 80s and 90s.