Computer internals What is the computer internals ? Types of Computers

Computer internals
1.What is the computer internals ?
2. Types of Computers
3 Hardware Components
PLAN :
1.Wh at is the Computer internals?
Computer internals 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.
A computer system consists of two major elements: hardware and software.
Computer hardware is the collection of all the parts you can physically touch.
Computer software, on the other hand, is not something you can touch. Software is a set of
instructions for a computer to perform specific operations. You need both hardware and
software for a computer system to work.
Types of Computers
Before looking at the various components, it is useful to distinguish between two
different types of computers : desktop computers and laptop computers. A desktop
computer consists of a computer case and a separate monitor, keyboard, and mouse. As
t h e name suggests, this type of computer is typically placed on a desk and is not very
portable .
A laptop computer has the same components but integrated into a single, portable unit.
Hardware Components
Let's start with the computer case. This is the metal enclosure that
contains many of the other hardware components. It comes in various shapes and sizes, but a typical tower model is between 15- 25 inches high. Want to know what's inside? Okay, go get a
screwdriver and let's open it up. Seriously, if you are really into
computers, the best way to learn is to actually get hands-on. To
save us some time, however, have a look at this desktop computer
case. A computer enthusiast replaced the metal side panel with a
transparent one, so we can have a look inside.
Although that photo looks pretty cool, it is a bit
hard to recognize the individual components, especially with all the connecting wires running through it. This figure shows a more schematic version of a desktop computer, which makes it easier to point out the essential hardware components.
Perhaps the most influential component is
the central processing unit. Its function is to execute program instructions and coordinate the activities of all the other units. In a way, it is the 'brain' of the computer. The main memory (a collection of RAM chips) holds the instructions
an d data which are being processed by the CPU.
Peripherals are the physical units attached to the
computer. They include storage devices and input/ output devices.
Storage devices(hard drives, DVD drives or flash drives)
provide a permanent storage of both data and programs.Disk
drives are used to read and write data on disks. Input devices
enable data to go into the computer's memory. The most common
input devices are the mouse and the keyboardOutput
devices enable us to extract the finished product from the system.
For example, the computer shows the output on the monitor or
prints the results onto paper by means of a printer.
On the rear panel of the computer there are
several portsinto which we can plug a wide range of peripherals - a modem, a digital camera, a scanner, etc. They allow communication between the computer and the
devices. Modern desktop PCs haveUSB ports andmemory
card readers on the front panel.