When you mention word "technology," most people think about computers. Virtually every facet of our lives has some computerized component. The appliances in our homes have microprocessors built into them, as do our televisions. Even our cars have a computer. However, computer that everyone thinks of first is typically personal computer, or PC.
It is a general-purpose tool, built around a microprocessor. A PC has many different parts such as memories, a hard disk, a modem, etc that work together. A PC is said to be "general purpose" because you can do many different things with it like: you can use it to type documents, send e-mail, browse Web and play games.
Let us look at main components of a typical desktop computer.
Central processing unit (CPU): The microprocessor "brain" of computer system is referred to as central processing unit. The CPU oversees everything that a computer does.
Memory: This fast storage area is for storing data and is connected directly to microprocessor. That's why it is fast. There are various types of memory in a computer system:
Random-access memory (RAM): Used to temporarily store information that computer is currently working with.
Read-only memory (ROM): It refers to computer memory chips, containing permanent or semi-permanent data that does not change.
Basic Input/Output: Required to establish basic communication when system is turned on. It is directly connected to motherboard.