Computer System:
1. Application -> igracias, Office, facebook
General-purpose programs -> Office, web browser
Application-spesific programs -> igracias, ATM, Point of Sale
2.System -> Linux, Windows, OS
System Management Programs
System Development Programs
System Software:
– To control or manage your rwsource computer
– Interface between hardware and application program
Kind of software:
– E-mail -> hotmail
– Word Processing -> MS. Word
– Electronic Spreadsheet -> MS. Excell
– Presentation Graphic -> MS. Power Point
– Multimedia -> Adobe Photoshop
– Personal Information manager -> MS. Outlook
– Groupware -> MS. Exchange
The function of Operating System:
1. Resource management
2. Task management
3. File management
4. Utilities and offer functions -> manage the use of memory
5. User interface: Help user communicate with computer
– Command-drive user: User type the instruction
– Menu-drive
Process Handling:
1. Multi programming: 2 programs or more that run together, on the different time
2. Time-Sharing:
3. Virtual Saving: Case, memory
4. Multi-Tasking: Run number of programs on the same time
5. Multi-processig: Run 2 or more instruction with different CPU
LANGUAGE PROGRAM
EVOLUTION
1st generation: Machine language, user-written programs
2nd generation: Assembly language, Packaged programs
3rd generation: Operating System, High level language
4th generation: DBMS, 4th generation language, Microcomputer package
5th generation: Natural language like query language, Artificial Intelligence (computer can communicate with human)
Lowest: Machine Language, Binary
DATABASE
Personal Database:
1.Payroll file
2. Benefit file
Weakness:
1. Duplicate data
2. Data separation
3. Not consistent
4. Depend file program
5. File format not compatible
Database: For store and retrieve
DBMS: Maintain and develop database
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