This Website (Blog)
Provides you
with Free Online Computer Training (FOCT)
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GET TO KNOW THIS INTRODUCTION BEFORE GETTING STARTED
What Is Computer?
A computer
can be defined as an electronic device/machine which is capable of accepting
data, processing, storing data and producing output result under control
programs.
Identifying the parts of the computer System
CPU - Central Processing Unit (Brain of the
computer)
CPU is where
all operational activities are coordinated or carried out.
VDU - Visual
Display Unit e.g. Printer, Speakers, Scanner
What is Monitor?
Monitor is an
output device that displays information on the screen.
Types of Monitor
CRT - Cathode
Ray Tube
LCD - Liquid
Crystal Display
Keyboard – is an input device that enable user to communicate with the computer
system.
Types of keyboard
Standard – F1 to F10
Extended - F1 to F12
Meaning of some Computer Acronyms
·
UPS - Uninterruptible
Power Supply
·
UPS - It stores
power
·
VDU- Visual/Video
Display Unit e.g. Monitor, Printer etc.
·
VGA- Video
Graphic Array/Adapter
·
BIOS- Basic
Input Output System
·
OS- Operating
System
·
XP- Experience
·
NT- New
Technology,
Functions of the Mouse
·
Clicking
·
Dragging
·
Double clicking
·
Pointing
Motherboard – is a circuit board that houses all the wires, chips, slots of the
computer system.
Types of Motherboard
·
AT Motherboard – Advanced Technology (2)
·
ATX Motherboard Advanced technology Extended (3)
·
Baby AT Motherboard (1)
Computer Processors
Two (2) Major Manufacturers of Computer Processors
·
Intel - Pentiums
·
AMD - Athlon
e.g. 8086,
286, 386, Pentium I, II, III, IV, Celeron
Machine
Language (0s and 1s (Binary), Low-High, On-Off etc)
Identifying the Computer Ports
What is a Computer Port?
Computer Port: Is a channel, slot or holes
in which wires are being connected to. Find below as thus:
·
Power Port
·
P/S2 Keyboard port
·
(Purple)(Parallel/Serial)
·
P/S2 Mouse port (Light Green)
·
Serial Mouse Port (Dark Green)
·
VGA Port (Blue) – Video Graphic Adapter
·
Printer Port (red)
·
USB Port (Black) – Universal Serial Bus
·
Network Port Local area network
·
RJ45 Connector (Registered Jack)
·
Sound Port
Identifying the Buttons at the Front of the
Computer
·
Power button
·
Reset button
·
Eject Button
·
CD/DVD-Rom
What is Booting?
Booting is
the process of initializing the hardware and software component of the system.
Types of booting
·
Cold booting – refers to the initial starting of the computer
system.
·
Warm booting – refers to the re-starting of the computer system.
Computer Drives comprises of
·
Drive A - Floppy Disk (31/2”) or (3.5”)
·
Drive B - (51/4”) or (5.25”)
·
Drive C - Hard Disk (Local Drive), C Drive .eg. 80gb,
120gb etc.
·
Drive D - CD/DVD Rom (Digital Versatile Disk)
·
Recordable CD-R
·
Rewritable (RW) 700mb (millions)
·
Recordable DVD-R
·
Rewritable DVD-RW 4.7 GB (billions)
·
Burners (DVD Writers)
·
Others - USB
Characteristics of Computer
·
Speed
·
Versatility
·
Accuracy
·
Durability
Mouse button divided into:
·
Primary button (left)
·
Secondary button (right)
Types of Mice
·
Optical mouse
·
Mechanical mouse
·
Wireless (Cordless)
·
Touch pad (laptop)
