COMPUTER SYSTEM :
Software
Information Coding Schemes
Number System
Hardware
System Concept
Binary
Hexadecimal
Decimal
🚩The combination of 0s and 1s that represent character are defines by the pattern
💥*Unicode *(Uniform code capable of representing all world's language)
💥:ASCII (American Standard Code for Information Interchange )
💥EBCDIC (Extended Binary Coded Decimal Interchange Code )
System Software
Application Software
Consists of the program that control
or mantain the operation of the computer and its device
text
Type Of System software
Operating software
Utility Program
Embedded / mobile
Server
Stand-alone
❎ Windows
❎ UNIX
❎ Linux
UNIX⭐
Linux⭐
Windows Server 2008⭐
❗ iPhone OS
❗ Google Android
❗Windows Phone 7
Compression Tools
Function of OS
Start and shut down a computer
Provide a user interface
Manage program
Manage memory
Coordinate tasks
Configure device
Establish an internet connection
Monitor performance
Provide utilities
Automatically update
Control a network
Administer security
Warm boot
Cold boot
Turning on a computer that has been
powered off completely
Using the operating system
to restart a computer
Controls how to enter data and instruction and how
information is displayed on the screeb
How an operating system handles programs directly affects your productivity
Optimizes the use of RAM
The operating system determines the order in which tasks are processed
Driver
Plug and Play
A small program that tells the operating system how
to communicate with specific device
automatically configures new device if installed
Operating system typically provide a means to establish Internet connections
A performance monitor is a program that assesses and reports information about various computer resources and device
Operating system often provide users with thw capability of : Managing files, Searching for files , Viewing images, Securing a computer
Automatically provides update to the program
Organizes and coordinates how multiple users access and share resources on anetwork
🚫Establish permission to resources
🚫 Define who & when they can acess certain resources
🚫By setting user account
Anti-Virus Program
Disk Cleanup
Spyware Remover
File Manager
Disk Defragmenter
Backup and Restore
Utility searches for and removes unnecessary files
To provide routine file management task:
⭐Displaying a list of files
⭐ Organizing files in folders
⭐Creating shortcuts
A utility program is atype of system software that allows a user to perform manintenance-type tasks
To reduce the size of a file or storage
Protects a computer against viruses by identifying and removing any computer viruses found in memory or storage
Detect and deletes spyware and other similar programs
Reorganizes the files and unused space on a computer's hard disk ,the operating system accesses data more quickly and programs run faster.
A backup utility allows users to copy files to another storage medium in case of damage or loss
A restore utility reverses the process and returns backed up files to their original form
Spreadsheet
Presentation
Word Processing
Database
Web Browser
To access and interact with software from any computer or device that connected to the Internet
To create and manipulate documents
To create visual aids for presentation to communicate ideas,messages, and other information to a group
A database isa collection of data organized in amanner that allow access,retrieval and use of that data
To organize data in rows and column and perform calculation
Database Software to create, accesss and manage a database
Communication Device
Storage
System unit
Output Device
Input Device
Define
Display Device
Printers
Any type of hadware component that conveys information to one or more people
Speakers,headphones,and earbuds
Data projector
Interactive whiteboard
Force-feedback game controller
Tactile output
Define
Hardware component allow users to enter data and indtruction into a computer
Keyboard
Pointing Device
Touch-Screen & Touch-Sensitive
Game Controller
Web cam
Biometric Input
Microphone
Scanner and Reading Device
Type of storage
Optical Storage
Flash Memory
Magnetic Storage
Define
Storage hold data,instruction, and information for future use
Processor
Memory
Motherboard
Adapter Card
Memory Card Slot
Adapter Card Slot
Processor Slot
Control unit
Ariyhmetic logic unit
Volatile Memory
Nonvolatile Memory
MIDI
TV tuner
FireWire
Modem
Data Representation
Information Processing Cycle
Storage Capacity
✅ Kilobyte=1024 bytes
✅ Megabyte=1024 Kilobytes
✅ Gigabyte=1024 Megabyte
✅ Terabyte=1024 Gigabyte
✅ Petabye=1024 Terabytes
By using two unique binary digits 1 and 0 to represent the two states on and off
Bit The smallest unit of data the computer can process
Byte A group of 8 bits
Process
Input
Storage
Define
A complete, working computer, includes operating system software and hardware to make computer function
Output