Hardware Connected Outside the Computer's System Unit

What is Arrangement Unit?

As well known equally a computer chasis (system chasis), computer case or computer tower
A container that houses electronic components to make up a computer
To protect the sensitive electronic parts from the exterior elements

System Unit

Four virtually common types of personal computers:

Desktops

Desktop organization units located in separate example, called belfry unit (or belfry computer)
Has vertical system unit

Laptops

Laptop (notebook) system units are portable and much more than smaller than desktops
Ultrabooks (ultra-portables or mini notebooks) are lighter, thinner and accept longer battery life than other laptops

Tablets

Tablet system units (tablets computers) are located behind the monitor
Smaller, lighter and more often than not less powerful than laptops
Use a virtual keyboards

Mobile Devices

Mobile devices (handheld computers) smallest and fit comfortably in 1 hand
The most popular type of personal computer
System units located backside the display screen (monitor)

Components

Like basic components in all types of personal computer mention above are:

Organization Board
Microprocessor
Memory

Organisation Board

Other names - mainboard or motherboard.
Controls all communication for the computer organization.
Connect with all external and internal devices and components

Sockets - provide connection points for chips (silicon chips, semiconductors, integrated circuit).
Slots - provide connection points for specialized card or circuit lath.
Bus lines - provide pathways to support communication.

Motherboard

Microprocessor

CPU

In most personal computers, the Central Processing Unit (CPU) or processor is contained on a single bit called the microprocessor. It has two basic components:

Control Unit (CU)
Arithmetic Logic Unit (ALU)

Memory

Holds data, instructions and informations
Three type of memory fries:

i) Random Admission Retention (RAM)

Volatile or temporary memory (storage) considering their contents are lost if power is disrupted.

Cache memory is a loftier-speed holding area for frequenly used data and information.
DIMM is used to expand retentivity.
Virtual retentiveness devides large programs into parts that are read into RAM equally needed.

2) Read-Only Retention (ROM)

Non-volatile memory and command essential arrangement operations.

Information stored by manufacturer

3) Flash Memory

Combination of both RAM and ROM

Does not lose its contents when power is removed

RAM

Expansion Slots & Cards

Almost computers permit users to expland their systems by providing expansion slots on their system boards to accept expansion cards.
Examples of expansion cards:

Graphics Cards
Sound Cards
Network Adapter Cards/Network Interface Cards (NIC)
Wireless Network Cards

Plug and play is the ability for a computer to recognize and configure a device without human interaction.

Double-decker Lines

Also knows as buses
Provide data pathways that connect diverse arrangement components
Bus width - the number of bits that tin can travel simultaneously
System buses - connect CPU and memory
Expansion buses - connect CPU and slots

Expansion Buses

Three types of principal expansion buses:

Universal Serial Charabanc (USB) can connect from one USB device to another)
Firewire bus is similar to USB passenger vehicle but more specialized.
PCI Express (PCIe) bus provides a single dedicated path for each continued device.

Ports

Connecting sockets on the outside of the system unit

Standard Ports
Four standard ports are:

Video Graphics Adapter (VGA) and Digital Video Interface (DVI) - provide connections to system unit
Universal Series Bus (USB) - to connect keyboards, mice, printers and storage devices
Firewire - provides high-speed connections to Firewire devices between devices and perconal computer such as camcorders and storage devices
Ethernet - high-speed networking port for Local Expanse Network (LAN) that has go a standard for many of today's computers

Specialized Ports
Five speciality ports are:

External Serial Advanced Technology Attachment (eSATA) - for loftier-speed connexion to big secondary storage devices.
Loftier Definition Multimedia Interfave (HDMI) - for high-definition digital audio and video.
Musical Instrument Digital Interface (MIDI) - for digital music.
Mini DisplayPort (MiniDP. mDP) - for big monitors.
Thunderbolt - for high-speed connections to upward to seven separate devices connected ane to another.

Cables - used to connect external devices to the system unit via ports.

Power Supply

Convert Alternating Current (Air conditioning) to Directly Current (DC)
Supply electrical free energy to our personal computer

Power Supply Unit

Source:
Computing Essentials 2015
Past:(Timothy J./Linda fifty./Daniel A.)O'Leary

Lesson 2: Input & Output >>>