SlideShare a Scribd company logo
1 of 10
Download to read offline
Evolution of Computers

Done by
D.Sai Tarun
Kumar and
Barghav
Manual Calculating Devices

Abacus and Napier’s bones are examples
calculating devices.
Abacus

of manual

Abacus is used as the ancient counting board which is used in
Mesopotamia
around 3500 BC. The modern abacus probably
originated in 15 th century in China. Abacus is
used for calculation which is consistedof pitted
boards with pebbles or beads.

Napier’s bones
This calculating device was invented by
John Napier in 17 th century. Napier’s bones
are number rods that can be used for
multiplying a long number by a
mi-Automatic Calculating Devices
 Pascal’s adding machine (Pascaline) (1642):
One of the first semi-automatic mechanical devices,
the Pascaline , was developed by Blaise Pascal. This
brass
rectangular box had eight movable dials to add sums up
to eight digits long.
 Staffelwalze(the step reckoner)(1671):
German mathematician and philosopher Gottfried
Wilhelm von Libniz developed the Staffelwalze , which
was an improvement over the Pascaline. The
Staffelwalze allowed the user to add, subtract,
multiply, and divide.
 Jacquard’s loom(1801): Joseph Jacquard
devised a mechanical loom, called Jacquard’s loom,
which
made weaving complex patterns a lot easier. The device
used instuctions stored on a punched card to control the
movement of threads.
 Difference engine(1822): English mathematician
Charles Babbage, often called the
‘father of computer’, proposed a macine called
difference engine.
 Analytical engine(1832): Charles Babbage
proposed another machine, the Analytical
engine, which had the basic elements of a
modern general-purpose computer.
Electromechanical
Calculating Devices

The tabulating machine and Harvard Mark1 are examples
of Electromechanical Calculating Devices.
 Tabulating machine(1887): American inventor Herman
Hollerith invented the tabulating machine,
which used punched cards for for storing and
processing information. In 1890, Hollerith’s
machine wasused to process data for the US
census. In 1896,Hollerith founded the Tbulating
Machine Company, which, after a series of mergers,
eventually became International
Bussiness Machines(IBM)
in 1924.
 Harvard Mark1(1944): American Computer
engineer HowardH. Aiken devised the IBM
Automatic Sequence Controled Calculater or Harvard
Mark1. It was used for creating ballistic charts for the
US
Navy. Though slower in comparison to modern
computers(taking about 3 to 4 seconds per calculation), it
could perform basic arithmetic as well as
more complex calculations.

Electronic Computers
Electonic computers are classified into various
generations on the
basis of the difference in technology. Each of these
generations
First-generation Computers

First-generation computers used vaccum tubes. Some of
these are discussed below.
Atanasoff-Berry computer(1941): The Atanasoff Berry
Computer (ABC), built by John Atanasoff and Clifford Berry.
Z3(1941): The Z3, developed by German engineer Knrad Zuse, was
used in designing airplanes and missiles.
Colossus(1943): The colossus computers were made by the British to
decode German messages during World War2.
ENIAC(1939-1946): The Electronic Numerical Integrator and
Computer(ENIAC), developed by John Mauchly and
J.PresperEckert, was the 1 st
general –purpose digital computer. It was a huge machine,
weighing about 30 tons.
EDSAC(1947-1949: Electronic Delay Storage Automatic Calculator
EDSAC(1947-1949
(EDSAC) was designed by Professor M.Wilkes of
EDVAC(1949):Electronic Discrete Variable Automatic
EDVAC(1949):
Calculator (EdVAC), developed by John Mauchly and
J.Presper Eckert, was the successor of ENIAC. It could
hold
both a programand data in its memory.
UNIVAC1 (1951):Universal Automatic Computer1
(1951):
(UNIVAC)
was one of the first commercially available computers.
Second-Generation Computers(1954-1959)
Second-Generation Computers were based on
transistors.Model 604, IBM 1401, and IBM 1620
are a few examples of second-Generation computers.
Third-Generation Computers(1959-1971)
Third-Generation Computers were based on
integrated circuits. An integrated circuit
IBM’s 360 series and 370 series computers are
examples of Third-Generation Computers.

Forth-Generation Computers(1971-Present)
Forth-Generation Computers are based on
microprocessors.IBM’s
personal computer (PC) and Apple’s Macintosh are
examples of
Forth-Generation Computers.
Computers power point presentation

More Related Content

What's hot

History of Computer
History of ComputerHistory of Computer
History of ComputerPeachBayBeam
 
Lesson 1 history of computer (grade 1)
Lesson 1 history of computer (grade 1)Lesson 1 history of computer (grade 1)
Lesson 1 history of computer (grade 1)Shaw Cruz
 
Evolution / history of Computer
Evolution / history of ComputerEvolution / history of Computer
Evolution / history of ComputerAAKASH KUMAR
 
History of Computer Technology
History of Computer TechnologyHistory of Computer Technology
History of Computer TechnologyDanz Magdaraog
 
Computer Generations
Computer GenerationsComputer Generations
Computer GenerationsAris Santos
 
evolution of computers
 evolution of computers evolution of computers
evolution of computersBhavya Chawla
 
The Evolution of Information Technology
The Evolution of Information TechnologyThe Evolution of Information Technology
The Evolution of Information TechnologySatyendra Arora
 
Proper Care Of Computers
Proper Care Of ComputersProper Care Of Computers
Proper Care Of ComputersLUZ PINGOL
 
The evolution of computers
The evolution of computersThe evolution of computers
The evolution of computersSharat Chandu
 
Basic of Computer fundamental
Basic of Computer fundamental Basic of Computer fundamental
Basic of Computer fundamental Sohan Grover
 
Computer Lab Rules
Computer Lab  RulesComputer Lab  Rules
Computer Lab Rulesguest5431f2
 

What's hot (20)

Brief history of computers
Brief history of computersBrief history of computers
Brief history of computers
 
History of Computer
History of ComputerHistory of Computer
History of Computer
 
Lesson 1 history of computer (grade 1)
Lesson 1 history of computer (grade 1)Lesson 1 history of computer (grade 1)
Lesson 1 history of computer (grade 1)
 
A brief history of computers
A brief history of computersA brief history of computers
A brief history of computers
 
History of computing
History of computingHistory of computing
History of computing
 
Evolution / history of Computer
Evolution / history of ComputerEvolution / history of Computer
Evolution / history of Computer
 
History of programming
History of programmingHistory of programming
History of programming
 
History of Computer Technology
History of Computer TechnologyHistory of Computer Technology
History of Computer Technology
 
Computer Generations
Computer GenerationsComputer Generations
Computer Generations
 
evolution of computers
 evolution of computers evolution of computers
evolution of computers
 
Evolution of computers
Evolution  of computersEvolution  of computers
Evolution of computers
 
The Evolution of Information Technology
The Evolution of Information TechnologyThe Evolution of Information Technology
The Evolution of Information Technology
 
History of Computers
History of ComputersHistory of Computers
History of Computers
 
Proper Care Of Computers
Proper Care Of ComputersProper Care Of Computers
Proper Care Of Computers
 
The evolution of computers
The evolution of computersThe evolution of computers
The evolution of computers
 
Evolution of computer
Evolution of computer   Evolution of computer
Evolution of computer
 
Basic of Computer fundamental
Basic of Computer fundamental Basic of Computer fundamental
Basic of Computer fundamental
 
Computer Lab Rules
Computer Lab  RulesComputer Lab  Rules
Computer Lab Rules
 
Keyboard history
Keyboard historyKeyboard history
Keyboard history
 
Computer Programming - Lecture 2
Computer Programming - Lecture 2Computer Programming - Lecture 2
Computer Programming - Lecture 2
 

Viewers also liked

Viewers also liked (20)

History of computer technology
History of computer technology History of computer technology
History of computer technology
 
Timeline of the History of Computer
Timeline of the History of ComputerTimeline of the History of Computer
Timeline of the History of Computer
 
History of Computers
History of ComputersHistory of Computers
History of Computers
 
The History Of Computers
The History Of ComputersThe History Of Computers
The History Of Computers
 
Calculator
CalculatorCalculator
Calculator
 
The history of tax administration of kosovo and i’ts efficiency (2)
The history of tax administration of kosovo and  i’ts efficiency (2)The history of tax administration of kosovo and  i’ts efficiency (2)
The history of tax administration of kosovo and i’ts efficiency (2)
 
History of computers
History of computersHistory of computers
History of computers
 
Lectweek1
Lectweek1Lectweek1
Lectweek1
 
Computer history timeline
Computer history timelineComputer history timeline
Computer history timeline
 
The History of Computers
The History of ComputersThe History of Computers
The History of Computers
 
Computers' History Timeline
Computers' History TimelineComputers' History Timeline
Computers' History Timeline
 
Cash Register
Cash RegisterCash Register
Cash Register
 
History of Computers
History of ComputersHistory of Computers
History of Computers
 
Abacus study material
Abacus study materialAbacus study material
Abacus study material
 
History of Calculator
History of CalculatorHistory of Calculator
History of Calculator
 
Wal mart intro and history ppt
Wal mart intro and history pptWal mart intro and history ppt
Wal mart intro and history ppt
 
Introduction and brief history of computers
Introduction and brief history of computersIntroduction and brief history of computers
Introduction and brief history of computers
 
4[.5a Box Whiskers
4[.5a Box Whiskers4[.5a Box Whiskers
4[.5a Box Whiskers
 
E commerce kunal
E commerce kunalE commerce kunal
E commerce kunal
 
Use of technology
Use of technologyUse of technology
Use of technology
 

Similar to Computers power point presentation (20)

History of computer
History of computerHistory of computer
History of computer
 
history & ages of computer
history & ages of computerhistory & ages of computer
history & ages of computer
 
My ppt on development
My ppt on developmentMy ppt on development
My ppt on development
 
History of Computer
History of ComputerHistory of Computer
History of Computer
 
History of computers_h
History of computers_hHistory of computers_h
History of computers_h
 
Computer History
Computer HistoryComputer History
Computer History
 
History of computers
History of computersHistory of computers
History of computers
 
Lesson Four
Lesson FourLesson Four
Lesson Four
 
History of computer
History of computerHistory of computer
History of computer
 
History evaluation
History evaluationHistory evaluation
History evaluation
 
ICT LESSON: HISTORY OF COMPUTER
ICT LESSON: HISTORY OF COMPUTERICT LESSON: HISTORY OF COMPUTER
ICT LESSON: HISTORY OF COMPUTER
 
The Five Generations of Computers
The Five Generations of ComputersThe Five Generations of Computers
The Five Generations of Computers
 
introduction to computer science
introduction to computer science introduction to computer science
introduction to computer science
 
Generation of computers
Generation of computersGeneration of computers
Generation of computers
 
History of computer
History of computerHistory of computer
History of computer
 
Introduction to computer science
Introduction to computer scienceIntroduction to computer science
Introduction to computer science
 
introduction to Computer system
introduction to Computer systemintroduction to Computer system
introduction to Computer system
 
lecture 1
lecture 1lecture 1
lecture 1
 
History of computers
History of computersHistory of computers
History of computers
 
History of computer 08
History of computer 08History of computer 08
History of computer 08
 

More from Sai Tharun

non conventional sources of energy
non conventional sources of energy non conventional sources of energy
non conventional sources of energy Sai Tharun
 
Wonders of ppt
Wonders of pptWonders of ppt
Wonders of pptSai Tharun
 
Crop variety improvement
Crop variety improvementCrop variety improvement
Crop variety improvementSai Tharun
 
Education ppt-template-018
Education ppt-template-018Education ppt-template-018
Education ppt-template-018Sai Tharun
 
Crop improvement by D.Sai Tarun Kumar
Crop improvement by D.Sai Tarun KumarCrop improvement by D.Sai Tarun Kumar
Crop improvement by D.Sai Tarun KumarSai Tharun
 

More from Sai Tharun (6)

Festivals
FestivalsFestivals
Festivals
 
non conventional sources of energy
non conventional sources of energy non conventional sources of energy
non conventional sources of energy
 
Wonders of ppt
Wonders of pptWonders of ppt
Wonders of ppt
 
Crop variety improvement
Crop variety improvementCrop variety improvement
Crop variety improvement
 
Education ppt-template-018
Education ppt-template-018Education ppt-template-018
Education ppt-template-018
 
Crop improvement by D.Sai Tarun Kumar
Crop improvement by D.Sai Tarun KumarCrop improvement by D.Sai Tarun Kumar
Crop improvement by D.Sai Tarun Kumar
 

Recently uploaded

Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphNetziValdelomar1
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxKatherine Villaluna
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptxSandy Millin
 
The Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsThe Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsEugene Lysak
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxAditiChauhan701637
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17Celine George
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxKatherine Villaluna
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapitolTechU
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice documentXsasf Sfdfasd
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxDr. Asif Anas
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and stepobaje godwin sunday
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17Celine George
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesMohammad Hassany
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxDr. Santhosh Kumar. N
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...Nguyen Thanh Tu Collection
 
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxiammrhaywood
 
How to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesHow to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesCeline George
 

Recently uploaded (20)

Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a Paragraph
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptx
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
 
The Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsThe Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George Wells
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024
 
Prelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quizPrelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quiz
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptx
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptx
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice document
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptx
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and step
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17
 
Human-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming ClassesHuman-AI Co-Creation of Worked Examples for Programming Classes
Human-AI Co-Creation of Worked Examples for Programming Classes
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptx
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
 
How to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesHow to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 Sales
 

Computers power point presentation

  • 1. Evolution of Computers Done by D.Sai Tarun Kumar and Barghav
  • 2. Manual Calculating Devices Abacus and Napier’s bones are examples calculating devices. Abacus of manual Abacus is used as the ancient counting board which is used in Mesopotamia around 3500 BC. The modern abacus probably originated in 15 th century in China. Abacus is used for calculation which is consistedof pitted boards with pebbles or beads. Napier’s bones This calculating device was invented by John Napier in 17 th century. Napier’s bones are number rods that can be used for multiplying a long number by a
  • 3. mi-Automatic Calculating Devices  Pascal’s adding machine (Pascaline) (1642): One of the first semi-automatic mechanical devices, the Pascaline , was developed by Blaise Pascal. This brass rectangular box had eight movable dials to add sums up to eight digits long.  Staffelwalze(the step reckoner)(1671): German mathematician and philosopher Gottfried Wilhelm von Libniz developed the Staffelwalze , which was an improvement over the Pascaline. The Staffelwalze allowed the user to add, subtract, multiply, and divide.
  • 4.  Jacquard’s loom(1801): Joseph Jacquard devised a mechanical loom, called Jacquard’s loom, which made weaving complex patterns a lot easier. The device used instuctions stored on a punched card to control the movement of threads.  Difference engine(1822): English mathematician Charles Babbage, often called the ‘father of computer’, proposed a macine called difference engine.  Analytical engine(1832): Charles Babbage proposed another machine, the Analytical engine, which had the basic elements of a modern general-purpose computer.
  • 5. Electromechanical Calculating Devices The tabulating machine and Harvard Mark1 are examples of Electromechanical Calculating Devices.  Tabulating machine(1887): American inventor Herman Hollerith invented the tabulating machine, which used punched cards for for storing and processing information. In 1890, Hollerith’s machine wasused to process data for the US census. In 1896,Hollerith founded the Tbulating Machine Company, which, after a series of mergers, eventually became International Bussiness Machines(IBM) in 1924.
  • 6.  Harvard Mark1(1944): American Computer engineer HowardH. Aiken devised the IBM Automatic Sequence Controled Calculater or Harvard Mark1. It was used for creating ballistic charts for the US Navy. Though slower in comparison to modern computers(taking about 3 to 4 seconds per calculation), it could perform basic arithmetic as well as more complex calculations. Electronic Computers Electonic computers are classified into various generations on the basis of the difference in technology. Each of these generations
  • 7. First-generation Computers First-generation computers used vaccum tubes. Some of these are discussed below. Atanasoff-Berry computer(1941): The Atanasoff Berry Computer (ABC), built by John Atanasoff and Clifford Berry. Z3(1941): The Z3, developed by German engineer Knrad Zuse, was used in designing airplanes and missiles. Colossus(1943): The colossus computers were made by the British to decode German messages during World War2. ENIAC(1939-1946): The Electronic Numerical Integrator and Computer(ENIAC), developed by John Mauchly and J.PresperEckert, was the 1 st general –purpose digital computer. It was a huge machine, weighing about 30 tons. EDSAC(1947-1949: Electronic Delay Storage Automatic Calculator EDSAC(1947-1949 (EDSAC) was designed by Professor M.Wilkes of
  • 8. EDVAC(1949):Electronic Discrete Variable Automatic EDVAC(1949): Calculator (EdVAC), developed by John Mauchly and J.Presper Eckert, was the successor of ENIAC. It could hold both a programand data in its memory. UNIVAC1 (1951):Universal Automatic Computer1 (1951): (UNIVAC) was one of the first commercially available computers. Second-Generation Computers(1954-1959) Second-Generation Computers were based on transistors.Model 604, IBM 1401, and IBM 1620 are a few examples of second-Generation computers. Third-Generation Computers(1959-1971) Third-Generation Computers were based on integrated circuits. An integrated circuit
  • 9. IBM’s 360 series and 370 series computers are examples of Third-Generation Computers. Forth-Generation Computers(1971-Present) Forth-Generation Computers are based on microprocessors.IBM’s personal computer (PC) and Apple’s Macintosh are examples of Forth-Generation Computers.