Introduction to Computer

Er. Sohan GroverIT-Trainer

What is Computer ?

Computer is an Electronic Machine that Receive the instruction to the Existing user and process it and finally give the output according to the user need.

Computer is an electronic device that process, stores and outputs data at high speeds.

What is electronics machine???

What is electrical machine???

What is the difference between electronics and electrical machine????

Basic advantage of a computer

1. Speed

2. Multitask

3. Save time

4. Accuracy

Disadvantages of a Computer ??

1. Decision

2. Validation

3. Maintenance

4. Misuse

Components of computer???

Hardware

The physical components of the computer which are located inside the cabinet.

Major Components of computer Hardware :

1. Input Devices

2. Output Devices

3. Processing Unit

An INPUT DEVICE lets you TALK TO the

computer

An OUTPUT DEVICE lets the computer

TALK TO you

The CPU(Central Processing Unit) is the brain of a computer – it tells the other parts

what to do

The CPU Stand for the..

Central Processing Unit

ALU (Arithmetic & Logical Unit)

MU

(Memory Unit)

CU

Control Unit

Parts of CPU

The RAM(Random Access Memory) is the temporary memory

of a computer

The ROM(Read Only Memory)

is the permanent memoryof a computer

What is Computer Software?

Software is the combination of different types of instruction that made for perform a specific task .

Computer Software are programs that tell the computer what to do.

World first calculation machine

World first calculation machine

The Abacus ( 1623 )

◦ The first computing aid that were used to help them in their computation. (John Napier )

Pascal calculation machine (1642)

Only (+,-)

The Difference Engine◦ An automatic, mechanical calculator designed to

tabulate polynomial functions. ◦ By 1822 the English mathematician Charles Babbage

who is considered as Father of the Computer today was proposing a steam driven calculating machine the size of a room

Ada Agusta (first worlds programmer)

Embedded at Difference Engine

1890 America scientist Harman hollyrath

Create a machine those are used in americapeople calculation.

1939 atanasof and berry made first world electronic digital computer (ABC computer )

1946 America scientist JP Eckert and John Markel Made world first computer ENIAC

1954 (General electronics corporation )UNIVAC

EVOLUTION OF COMPUTERS

GENERATION 1 GENERATION 2 GENERATION 3

GENERATION 4 GENERATION 5

FIRST GENERATION COMPUTERS

1. Use of vacuum tubes2. Big & Clumsy3. High Electricity Consumption4. Programming in Mechanical Language5. Larger AC were needed6. Lot of electricity failure occurred

SECOND GENERATION COMPUTERS

1. Transistors were used2. Core Memory was developed3. Faster than First Generation computers4. First Operating System was developed5. Programming was in Machine Language & Assembly Language6. Magnetic tapes & discs were used7. Computers became smaller in size than the First Generation computers8. Computers consumed less heat & consumed less electricity

THIRD GENERATION COMPUTERS

1. Integrated circuits developed2. Power consumption was low3. SSI & MSI Technology was used4. High level languages were used

FOURTH GENERATION COMPUTERS

1. LSI & VLSI Technology used2. Development of Portable Computers3. RAID Technology of data storage4. Used in virtual reality, multimedia, simulation5. Computers started in use for Data Communication6. Different types of memories with very high accessing speed & storage capacity

FIFTH GENERATION COMPUTERS

1. Used in parallel processing2. Uses superconductors3. Used in speech recognition4. Used in intelligent robots5. Used in artificial intelligence

The future promises advanced technology in computing. Faster, smarter and more affordable.

THE END

ER. SOHAN SINGH GROVERIT - TRAINER

Thank you dear

students