Historical evaluation of computer

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Historical Evaluation of Computer

Functions of Computer

Characteristics and Limitations Of Computer

Generations Of Computer

Classification Of Computer

Computer System and Technology

Software

Operating System

Computer Language

Computer

“The computer was born to solve problems that did not exist before.”

Functions Of Computer

Accept Data

Process Data

Output Data

Characteristics Of Computer

Faster

Diligence

Accurate

Vast Memory

Reliability

Various Performance

Limitations Of Computer

Costly

Dependent

Need of an expert programmer

Non Standardization

Artificial

Various Generations of ComputerFirst generation computer(1951-1959): Use of vacuum tubes

Second generation computer(1959-1965): Use of transistors

Third generation computer(1965-1971): Use of IC

Forth Generation computer(1971-Current year): Use of large scale of Integration

Fifth Generation computer(future Generation): Use of ULSI

Classification of Computers

Digital ComputerMicro computer

Mini computer

Mainframe Computer

Super computer

Relationship Between System and Technology

Technology: Composed of hardware, software, data and telecommunication

System: Group of interrelated components

InputProcessingOutput

Feed back: Data about the performance of a system

Control: Monitoring and evaluating feedback

Components of Computer system

Hardware

Software

User

Data

Major Types of Software

Operating System

An integrated set of programs that acts as a basic platform for the hardware applications programs to run.

Functions of operating system

Multiprocessing Operating System

Classification of Operating System :

Batch/Off line Mode Operating System

Time sharing operating system

Multitasking Operating System

Distributed operating system

Virtual storage operating system

Real time Operating System

Computer Language

Language

Low level Language

1. Machine language

2. Assemble language

High level language

Machine language: Directly executed without any translation. Instruction written in what can understand by processor.

Assemble language: Instructions are written in codes and symbolic address.

Low Level Language

Easily Understandable for ComputerExecute FastMachine DependentInefficient in error findingHard for logic development

High Level Language

Human understand easilySlow in executionSlow in executionEasy in error findingEasy in developing logic

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