CHAPTER 7 - STORAGE

There are two types of storage: 

• Primary (RAM) : volatile / not permanent 
• Secondary : Permanent / not lost even the computer turn off 

Example of Secondary Storage: 

• Hard Disk 
• Memory Cards 
• Cloud Storage 
• Optical Disks 
• Magnetic Stripe Card and Smart Cards 

Three types of Optical Disk:

• CD-ROM (read only. meaning you can only play the song or video given) 
• CD-R (can be write but ONCE only. after burn (copy file to CD) you CANNOT add other file to it 
• CD-RW (can write and read for many times. the function is just like USB. you can delete, alter file, copy etc many times you want) 

CHAPTER 6 - OPERATING SYSTEM & UTILITY

SYSTEM SOFTWARE 

•Software can be divided into TWO types:

-Application Software

-System Software

•System Software is used to control and maintain the operations of computer and its devices

•SS provide User Interface between Application and Computer’s hardware

OPERATING SYSTEM

A set of programs containing instructions that work together to coordinate all the activities among computer hardware resources. 

THE USES OF OPERATING SYSTEM 

Functions of Operating Systems:

1)Start and shut-down computer

2)Providing user interface

3)Managing program

4)Managing memory

5)Coordinate tasks

6)Configuring devices

7)Monitor performances

8)Establish an Internet connection

CATEGORIES OF OPERATING SYSTEM 

Stand-alone

-It is used mostly in Personal Computer

-Example: Windows 7, Linux, Ubuntu

Server

-Is specifically designed to support network

-Example: Windows Server 2008, UNIX, Solaris

Embedded

-Operating system on mobile devices

-Example: iOS, Blackberry,  Android

UTILITIES 

A type of system software. Its allow user to perform maintenance-type tasks. Usually related to managing a computer, its devices or its programs.

UTILITIES FUNCTION 

Utility provides functions:

1)Managing files

2)Install / uninstall programs

3)Defragmenting disks / cleaning up disk

4)Setting up screen savers

5)Burning CD

6)Protecting against viruses