Operating system over view

Operating system over view

Master control system of the computer is known as operating system.

Software

System software

Operating system

Command line interface CLI	Graphical user interface GUI
Dos	Windows 94/98/2000
unix	2003/xp
Linux	Vaster
Handle bye the Advanced users	User friendly operating system

Operates by commands only (CLI)

Operates by graphical environment

computer

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computer

cable

computer cable

out put device

out put device



monitor
printer
speaker
plotters

input device

input device

01. key board
02.mouse
03.scanner
04.joystick
05.web cam
06.micro phone
07.touch screen

serial port

serial port





Fast than parallel

parallel port

parallel

parallel - Slow data travel

mother board

VGA

VGA

AGP- Accelerated Graphic port.

Interface Card – AGP video card only

Parallel type transmission

AGP faster than VGA

AGP directly connected into North Bridge.

VGA	AGP
Plug in to ISA or PCI	Plug in to AGP only
Slow	Fast
Connected in to south bridge	Connected in to north bridge
Not suitable for graphic	Most suitable for graphic
Memory available 2MB,4MB,8MB,16MB,	32MB,64MB,128MB 512MB,1024MB

Ram

Speed Table

Speed Table

1. 1Hz = Cycle per second

2. 1 KHz = 1000 KHz

3. 1 MHz = 1000 MHz

4. 1GHz = 1000 MHz

5. 1THz = 1000GHz

How to check the speed and memory of the Machine?

Start- Run-type the command “ dxding’’

Memory Table

Memory Table

1Byte = 8bits

1. (Kilo Byte) 1KB = 1024 Bytes

2. (Mega Byte) 1MB = 1024 KB

3. (Gigabyte) 1GB = 1024MB

4. (Tara Byte) 1TB = 1024GB

5. (Pet byte) 1PB = 1024TB

Classification Of computer

Classification Of computer

1. Super computer (special purpose computer)

2. Main frame computer

3. Mini computer

Workstation (more power full than pc)

4. Micro computer =

Pc (personal computer)

Desktop

Pc (personal computer) = Laptop

Portable computer – Palm top

Not book

Power Supply

Power Supply

Mainly there are tow type

01. AT - Advance technology

02. ATX - Advance technology Extenderd.

Form factor (power supply, size of the mother board case)

According to the power supply unit there two types mother board can be identified such as AT and ATX

AT	ATX
P8 and p9 power connections	20- pins p1 power connection
There is power on/off switch (manual)	Software base power on/off
Out voltage 12V and 5V	Out put voltage Rv,5V and 3.3V
Size – 30*5*33cm	Size- 30.5*24.4cm

Monitors

Monitors

1. CRT monitor -Cathode Ran table

mono cram ( low resolution)

CRT –

Color( High resolution)

2. LCD monitor -Light Cristal Display