Chapter One | Computer Science | HSEB Notes



Chapter One : INTRODUCTION TO COMPUTER 

   &   

·       Characteristics/Features of Computer
o   Speed
o   Accuracy
o   Reliability
o   Storage Capacity
o   Word Length
o   Deligence
o   Versatile
o   Automatic
o   Electronic
o   Non-intelligent
·       Application Areas of Computer
o   Education
o   Communication
o   Business
o   Transportation
o   Banking
o   Helth
o   Security
o   Industry
o   Scientific Research
o   Entertainment
o   Weather Forcasting
o   Desktop Publishing
o   Designing
o   Satellite Controlling
o   Aviation
·       Capabilities & Limitations of Computer
·       Advantages & disadvantages of Computer
·       History of Computer
o   Mechanical Age
§  Abacus
§  Stepped Reckoner (Leibniz Calculator)
§  Napier Bone
§  Diffence Engine
§  Slide Rule
§  Analytical Engine
§  Pascaline
§  Tabulating Machine
o   Electro Mechanical Age
§  MARK-I [Also known as ASCC (Automated Sequence Controlled Calculator)
§  MARK-II
§  ABC (Atanasoft Berry Computer)
o   Electric Age
§  ENIAC
§  EDAC
§  EDVAC
§  UNIVAC
·       Some Important Persons
o   Joseph Jaquard
o   Charles Babbage
o   George Boole
o   Herman Hollerith
o   Lady Augusta Ada Lovelace
·       Generation of Computer
 
1st Generation 

2nd Generation 

3rd Generation 

4th Generation 

5th Generation 

Technology Used 

Vaccum Tube 

Transistor 

IC 

Microprocessor 

Bio Chip 

Operating Speed 

Millisecond 

Microsecond 

Nanosecond 

Picosecond 

Femtosecond 

Programming Language 

Manching Level 

Assembly Level 

High Level 

4GL 

Natural 

Primary Memory 

Magnetic Core 

Magnetic Core 

Magnetic tape, Magnetic disk 

Magnetic and Optical disk 

 
THIS GENERATION OF COMPUTER IS STILL UNDER DEVELOPMENT SO, THESE FACTORS CAN’T BE ASKED/MENTIONED CURRENTLY 

Secondary Memory 

Magnetic tape, Magnetic drum 

Magnetic tape, Magnetic drum 

Magnetic tape, Magnetic disk 

Magnetic tape, Magnetic disk 

Input Device 

Punched card 

Punched card 

Keyboard 

Advanced I/O like Mouse,scanner 

Output Devics 

Printing Device 

Printing Device 

Monitor 

Advanced I/O like LCD, LED, Color Printer 

Cost 

Very High 

High 

Low 

Very Low 

Speed 

Very less 

Less 

Moderate 

High
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             ·         Artificial Intelligence (AI)
           o   Characteristics of AI