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Generations of computer

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Generations of Computer 1st to 5th Explained with Pictures.

The history of computer technology is often used to refer to the origin of all the different generations of computers . From first to fifth each computer generation is characterized by significant technological development in their components, memory , and elements which essentially changed the way these devices work.

Several periods of generation from over the years advanced the technological evolution leads to the creation of today’s modern computer with more complex, more powerful, and increased capability and functionality.

Introduction to Computer Generations

This development period of electronic computing technology is called Computer Generation. There are five generations of computers identified, although the sixth generation could be in development now in the early 21st century.

During the evolutionary timeline, each generation of computers has improved a lot by undergoing considerable changes in their size, type, and functionality.

By analyzing them, one can trace the evolution of computer technology, to see how the computer industry has changed over the years and how great capabilities and software progress has been made by humankind in under a hundred years , as a result, the creation of different generations.

At present, the computer is playing a significant part in human existence because today’s digital computer is being used for every work in each field. If someday an issue occurs in the computer or the server is down, at that point all the work stops. This is how significant it is for technology development!

In this article, I will introduce you to all the generations of computers with pictures by explaining the complete information about their characteristics , names, components , and examples too.

Generations of Computer From 1st to 5th

Let’s discover the series of computer generations in the following list:

1st Generation of Computer (1940-1956)

This first generation of computers was based on vacuum tube technology used for calculations, storage, and control, invented in 1904 by John Ambrose Fleming. The vacuum tubes and diode valves were the chief components of the first generations of computers.

First-generation computers relied on the lowest-level machine language, in order to perform operations, and could only solve a single problem at a point of time.

Magnetic drums were used as the memory in these computers (were very slow in speed). The punched and magnetic tapes were used for the input and output function of the computer in order to display on prints even the results weren’t 100% accurate.

Also, the first generation of computers available was based on the 8-bit microprocessor.

The disadvantages of 1st gen computers are that they were very enormous in size and heavy in weight (made of thousands of vacuum tubes ) , occupying large rooms. Also, once they were kept in one place it was difficult to transfer. Another con like using a decimal number system and many switches and cables.

In addition, they were also very expensive to operate with using a large amount of electricity, the vacuum tubes produced large amounts of heat, so an air conditioner was required for the proper functioning unless a lot of heat can cause a malfunction.

The advantage of the first generation of computers is that they could calculate in milliseconds (about five thousand sums per second.)

The computers of first-generation were managed to use in different fields like weather forecasting, solving mathematical problems, energy tasks, also in space research, military, and other scientific tasks.

In the first generation of computers, the first computer of the world named “ENIAC” (Electronic Numerical Integrator and Computer) was discovered by John Mauchly and J. Presper Eckert in the year between 1943 to 1945.

ENIAC used panel-to-panel wiring and switches for programming, occupied more than 1,000 square feet, used about 18,000 vacuum tubes, and weighed 30 tons.

Characteristics of the 1st Generation of Computer:

• Vacuum tubes and diode valves were used as the main electronic component in the first generation computers.
• Punch cards, paper tape utilized for input and output operations.
• Magnetic drums used for storage.
• Huge in size and weight with a lot of power consumption.
• Very expensive in price also not reliable.
• Computers were programmed with low-level machine language also has low operating speed.

Examples of the first generation of computers are ENIAC (Electronic Numerical Integrator and Computer), UNIVAC (Universal Automatic Computer) EDSEC (Electronic Delay Storage Automatic Calculator), EDVAC (Electronic Discrete Variable Automatic Computer), (Electronic delay storage automatic calculator), IBM -701 and IBM 650.

ENIAC, the first general-purpose electronic digital computer . This computer about 18,000 vacuum tubes used for the calculation result in huge in size, occupied more than 1,000 square feet, and weighed 30 tons. These were the harbingers of today’s digital computers. This first computing machine was designed by people J. P. Eckert, W. Mosley, J. W. Mauchly.

2nd Generation of Computer (1956-1964)

The second generation of computers replaced the vacuum tubes with a reliable component called transistors for manufacturing of computers was invented by William Shockley in 1947.

The transistors were the revolution in the computer field because this component advantaged the 2nd gen computer by increasing the performance, operating speed (hundreds of thousands of operations per second), as well as decreasing the electricity consumption of the computers.

Transistors were far superior to the vacuum tube, allowing computers to get faster, cheaper, more energy-efficient made and possible to reduce the size of computing equipment and ultimately heat reduced and reliability improved.

Computers of second-generation are characterized by the use of the first high-level programming languages, allowing programmers to specify instructions in words. At this time, early versions of COBOL, ALGOL, SNOBOL, and FORTRAN languages were developed .

These were the first computers to store their instructions in their memory, which went from a magnetic drum to magnetic core technology. During this period, the first computer game name “ Spacewar ” was seen on a PDP-1 computer.

Do you know~ that the oldest abacus was a computing machine designed to calculate thousands of years ago, which is still used in schools today to do calculations.

Also, the concept of Central Processing Unit (CPU), multi-programming operating systems, programming language, memory, and input and output units (I / O units) were developed in the timeline of second-generation computers.

The major disadvantages of Second-generation computers were they still relied on punch cards for input and hard copies for output as well as still it was difficult to move the computers for the reason they were enough large and even some computers needed ACs.

This second generation of computers was first used in the fields like the atomic energy industry and nuclear power plants and other commercial fields.

Characteristics of the 2nd Generation of Computer:

• Computers based on transistors instead of vacuum tubes.
• Magnetic Tape was used to store data.
• Relatively small in size and reduced weight with low energy consumption than 1st gen computers.
• Faster, reliable, and less expensive than the first generation.
• Use of storage devices, printers, and operating systems, etc.
• Higher-level languages like COBOL, ALGOL, SNOBOL, and FORTRAN were developed and used.

Examples of the second generation of computers include IBM 1620, CDC 1604, IBM 7094, UNIVAC 1108, IBM 620, CDC 3600, IBM 4044, Honeywell 400, IBM 1401 Mainframe, and PDP-1 minicomputer. IBM was actively working, producing transistor versions of its computers.

3rd Generation of Computer (1964-1971)

The third generation appeared in the form of integrated circuits (invented by Jack Kilby from 1958 to 1964). An IC (integrated circuit) is consists of many small transistors mounted on chips , which are called semiconductors.

This synchronized chip became an important foundation for the third generation computers when scientists combined hundreds of transistors fit in this circuit result in a more powerful electronic segment called an integrated circuit.

Multiprogramming was implemented (this is when there are several executable programs in memory) at the same time that it diminished their manufacturing costs. In the mid-60s. IBM improved the term “computer architecture”. By the end of the 60s. mini-computers appeared.

This revolutionary innovation allowed to expansion of the processing capacity and memory of the machines.

Instead of punch cards and prints, users interacted via keyboards and monitors , and interacted with an operating system, allowing the device to run various applications at once with a central program that monitored the memory.

As you can see, the first appearance of computer monitors fell on the second generation of computers. The invention belongs to the company IBM, which in 1964 released the commercial display station IBM-2250.

it was used in the system/360 series. The model had a vector monochrome display measuring 12×12 inches, with a resolution of 1024×1024 pixels and a refresh rate of 40 Hz. This invention revolutionized today’s different types of monitors including LCD, LED, OLED monitors.

The invention of IC incredibly decreased the size of computers and made it easy for transportation from one place to another. The working speed and efficiency of this generation of computers were much faster than the previous generation and even cheaper.

High-end languages such as PASCAL, BASIC, FORTRAN – II TO IV, COBOL, ALGOL developed in this generation.

For the first time, they got access to a mass audience allowed computers to penetrate into different spheres of human activity since they were smaller and cheaper. Along these, they turned out to be more specialized (i.e., there were different computers for different tasks).

The 3rd generation of computers was the initial move towards the miniaturization of computers and quickly expanded their scope: control, automation of scientific experiments, data transmission, etc. In addition to being used in the manufacture of radios, TVs, and other similar devices .

Characteristics of the 3rd Generation of Computer:

• In this generation, computers based on Integrated Circuit was more powerful than the transistor.
• The size of the computers was likewise little because the size of the IC being more modest than the circuit size of the transistors.
• More reliable, inexpensive, faster, energy-efficient, as well as very light in weight than 2nd gen computers.
• The first Computer Mouse and Keyboard were appeared and used in the 3rd generation of computers
• Use of new versions of high-level languages like BASIC, COBOL, FORTRAN, PASCAL, and ALGOL
• Available for a mass audience and made it possible for general purpose usage.

Some of the most popular models of the 3rd generation of computers were the ICL 2903, ICL 1900, TDC-B16, IBM 360 and 370, Honeywell 6000, UNIVAC 1108, PDP-8, and PDP-11, which were ideal in their handling multiprocessing capabilities, reliability, and flexibility than previous generations.

4th Generation of Computer (1971-2010)

The microprocessor brought the fourth generation of computers, as thousands of integrated circuits equivalent to about millions of transistors were assembled and brought the whole central processing unit and other fundamental elements of the machine into a small chip called a microprocessor fitted on the CPU socket.

These computers used Very Large Scale Integrated circuits technology also called VLSI technology. After the invention, the microprocessor began to used in computing machines in the fourth and fifth generations of computers.

Within the framework of the considered generation in 1971, the first microprocessor appeared as an unexpected result of Intel’s work on calculator circuits and further development of minicomputers ( PDP-11 ).

The first personal computer and a microcomputer was “ ALTAIR ” developed by the company MITS in 1974. Also, the first microprocessor was the Intel 4004, manufactured in 1971, initially for an electronic calculator. Whereas the computers of the first generation filled an entire room, while now the 4th generation ‘microprocessors’ fit in the palm of the hand.

This generation of computers used an operating system based on the graphical user interface (GUI), which means these numbers were very easy to perform mathematical and logical tasks.

The computers started to utilize high-speed memory systems on integrated circuits with a capacity of several megabytes. Computer performance has increased significantly (hundreds of millions of operations per second).

The high-level language like C, C ++, Java, PHP, Python, Visual Basic,  was utilized to compose programs in the computers of the fourth generation.

The advent of the first personal computers in the mid-70s gave every common user the same computing resources that enormous computers had during the 60s. These computers were made more modest, faster, and less expensive can undoubtedly be put on a table or desk. Which marked the so-called era of personal computers .

Peripheral devices examples , such as mice, joysticks, handheld devices, etc., were developed during this 4th generation. Computers could be connected together in a network to share information with each other, this has played an important role in the birth and development of LAN, Ethernet, and the Internet .

The most popular companies in the world like Intel and AMD were rising. Then again, companies like Microsoft and Apple introduced their operating systems ‘Windows’ and ‘Macintosh’ in the generation of this computer. Because of which the act of multimedia started.

This is the era where personal computers were born, an idea that actually persists today. Also, these were the generation of DEC’s (Digital Equipment Corporation) minicomputers.

Characteristics of the 4th Generation of Computer:

• Computers based on microprocessors and VLSI technology .
• The computers of 4th gen were small in size, lightweight, and almost portable computers.
• The integrating of multi cores in processors like Dual core , Octa core, etc has began.
• The processing speed of this computer generation was much faster and reliable than the previous three generations.
• The size and cost of power supply units has reduced.
• Use of languages ​​like C, C ++, .Net, Java, PHP, Python , Visual Basic.
• Use of GUI Based OS with more memory capacity.
• Accessible to the Internet .
• Due to the low cost of these computers, they were available to every common man.

Desktops, Laptops, Workstations, Tablets, Chromebooks , and Smartphones, are examples of the fourth generation of computers.

Good to Know~ Alan Turing is the father of modern computers born in England in 1912.

5th Generation of Computer (2010-At Present)

Artificial intelligence is the name of the fifth as well as the latest generation of computers based on ULSI (Ultra Large Scale Integration) technology is the process of integrating or embedding millions of transistors on a single silicon microchip.

Computing in the 5th computer generation is versatile made portable, powerful, lightweight, innovative, comfortable with low electricity consumption . Because of the Internet’s advantages , it extended its limits of use to limits never before suspected.

The main objective of the latest fifth-generation computing and effort made by computer researchers is to make them smart by incorporating Artificial Intelligence so as to develop devices that respond to the input of natural language and are capable of learning and self-organizing even in 2022 it is under development.

This new information technology has greatly increased the size and working ability of the microprocessor, which has prompted the use of computers in the various fields of Entertainment, Accounting, Educational institutes , Film-making, Traffic-control, Business applications , and Hospitals, Engineering, Researches, Defense, etc.

That’s why a computer of the 5th generation is also known as the AI (Artificial Intelligence) generation of computers.

Some computers are being intended to do all the work themselves as a human act, behave, and communicate. The best example of this is an Artificial Intelligence (AI) based computing machine in the 5th generation of computers “ Sophia ” a robot.

Characteristics of the 5th Generation of Computer:

• The main focus on AI-based computers.
• Computers made of microprocessors based on ULSI (Ultra Large Scale Integration) technology.
• The processing speed is quite high can perform billions of calculations in a second.
• Computers are portable, cheap, reliable, fast, and available in various forms and sizes like a Desktop, Laptop, Smartphone, Smartwatches, etc.
• Invention of the operating system such as Windows, Macintosh and ChromeOS of Chromebooks .
• Multimedia has evolved in this generation by combining Sound, Graphics, or Picture and Text.
• Development of Internet of Things.

Computers of the fifth generation are being made to think like us. For which continuous advancement of technologies like Artificial Intelligence, Internet of Things, Robotics, etc. Although the examples of AI computing software such as Chatbots, Windows Cortana, Google Assistant, Apple Siri, Speech recognition, that are being used today.

Classification of the computer by generations

Factors/reasons for the development of computer generations:.

There below are the general factors associated with the development and change in the generations of electronic computers:

• Improvement of the element base,
• Downsizing,
• Technological progress (increased performance, speed, and memory)
• Reduced cost,
• Development of  software ,
• Changes in architecture, expansion of the range of tasks solved by computers,
• Simplification and standardization of hardware.
• Changing the way of interaction between the user and the computer.

How many generations of computers have there been?

There are 5 computer generations till now i.e. vacuum tubes, transistors, integrated circuits, microprocessors, and the last one is artificial intelligence. 6th generation yet to come may be either in the form of quantum computers or developing the existing artificial intelligence technology to a greater extent.

What is the 6th generation of computers?

Electronic computers are usually divided into five generations now and the 6th generation is still in development but has the potential to give birth to the sixth generation of computers may be in the form of quantum computing.

Which is the current modern generation of computers today?

The technologies based on artificial intelligence are the current and the latest generation of computers(5th GEN) today.

What is the historical development of computers according to generation?

In accordance with the methodology for assessing the development of computer technology, the first generation was considered to be vacuum tube computers, the second – transistor computers, the third – computers on integrated circuits, the fourth – using microprocessors, and the fifth generation computers is based on the artificial intelligence.

What is the generation of a colossus computer?

Colossus computer was the first generation of the computer developed and designed by Tommy Flowers at Bletchley Park in the year 1944 with the purpose of cracking Hitler’s codes.

The sixth will also discover in the future since there are some flaws of technology in this generation that will be revived or resolved in the upcoming generation.

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Generations of Computers – Computer Fundamentals

Generations of Computer : The modern computer took its shape with the arrival of your time. It had been around the 16th century when the evolution of the computer started. The initial computer faced many changes, obviously for the betterment. It continuously improved itself in terms of speed, accuracy, size, and price to urge the form of the fashionable day computer. 

Basic Terms Related to Computers

The basic terms related to generations of computers are listed below.

• Vacuum Tube: Vacuum tubes have the functionality of controlling the flow of electronics in a vacuum. Generally, it is used in switches, amplifiers, radios, televisions, etc.
• Transistor: A transistor helps in controlling the flow of electricity in devices, it works as an amplifier or a switch.
• Integrated Circuit (IC): Integrated circuits are silicon chips that contain their circuit elements like transistors, resistors, etc.
• Microprocessors: Microprocessors are the components that contain the CPU and its circuits and are present in the Integrated Circuit.
• Central Processing Unit (CPU): The CPU is called the brain of the computer. CPU performs processing and operations work.
• Magnetic Drum: Magnetic Drum is like a cylinder that stores data and cylinder.
• Magnetic Core: Magnetic cores are used to store information. These are arrays of small rings.
• Machine Language: Machine Language is the language that a computer accepts (in the form of binary digits). It is also called low-level programming language.
• Memory: Memory is used to store data, information, and program in a computer.
• Artificial Intelligence: Artificial Intelligence deals with creating intelligent machines and behaviors.

Phases of Computer Generations

This long period is often conveniently divided into the subsequent phases called computer generations.

• First Generation Computers (1940-1956)
• Second Generation Computers (1956-1963)
• Third Generation Computers (1964-1971)
• Fourth Generation Computers (1971-Present)
• Fifth Generation Computers (Present and Beyond)

Before the generation of computers, we used calculators, spreadsheets, and computer algebra systems, mathematicians and inventors searched for solutions to ease the burden of calculation. 

Below are the 8 Mechanical Calculators before modern computers were invented.

•  Abacus (ca. 2700 BC)
• Pascal’s Calculator (1652)
• Stepped Reckoner (1694)
• Arithmometer (1820)
• Comptometer (1887) and Comptograph (1889)
• The Difference Engine (1822)
• Analytical Engine (1834)
• The Millionaire (1893)

First Generation Computers

The technology behind the primary generation computers was a fragile glass device, which was called a vacuum tube. These computers were very heavy and really large. These weren’t very reliable and programming on them was a tedious task as they used low-level programming language and used no OS. First-generation computers were used for calculation, storage, and control purpose. They were too bulky and large that they needed a full room and consume a lot of electricity. Punch cards were used for improving the information for external storage. Magnetic card used . Machine and assembly language is developed.

Examples of some main first-generation computers are mentioned below.

• ENIAC: Electronic Numerical Integrator and Computer, built by J. Presper Eckert and John V. Mauchly was a general-purpose computer. It had been cumbersome, and large, and contained 18,000 vacuum tubes.
• EDVAC: Electronic Discrete Variable Automatic Computer was designed by von Neumann. It could store data also as instruction and thus the speed was enhanced.
• UNIVAC: Universal Automatic Computer was developed in 1952 by Eckert and Mauchly.

Vacuum Tube

Characteristics of First-Generation Computers

Second generation computers.

Second-generation computers used the technology of transistors rather than bulky vacuum tubes. Another feature was the core storage. A transistor may be a device composed of semiconductor material that amplifies a sign or opens or closes a circuit.

Transistors were invented in Bell Labs. The use of transistors made it possible to perform powerfully and with due speed. It reduced the dimensions and price and thankfully the warmth too, which was generated by vacuum tubes. Central Processing Unit (CPU), memory, programming language, and input, and output units also came into the force within the second generation.

The programming language was shifted from high level to programming language and made programming comparatively a simple task for programmers. Languages used for programming during this era were FORTRAN (1956), ALGOL (1958), and COBOL (1959).

Characteristics of Second-Generation Computers

Third generation computers.

During the third generation, technology envisaged a shift from huge transistors to integrated circuits, also referred to as IC. Here a variety of transistors were placed on silicon chips, called semiconductors. The most feature of this era’s computer was speed and reliability. IC was made from silicon and also called silicon chips.

The computer programs was designed to make the machine work. Operating system was a program designed to handle a machine completely. Because of the operating system machine could execute multiple jobs simultaneously. Integrated circuits were used to replace many transistors used in the second generation.

A single IC has many transistors, registers, and capacitors built on one thin slice of silicon. The value size was reduced and memory space and dealing efficiency were increased during this generation. Programming was now wiped out Higher level languages like BASIC (Beginners All-purpose Symbolic Instruction Code). Minicomputers find their shape during this era.

Integrated Circuit

Characteristics of Third-Generation Computers

Fourth generation computers.

In 1971 First microprocessors were used, the large-scale of integration LSI circuits built on one chip called microprocessors. The advantage of this technology is that one microprocessor can contain all the circuits required to perform arithmetic, logic, and control functions on one chip. LSI placed thousands of transistors onto a single chip.

The computers using microchips were called microcomputers. This generation provided even smaller size of computers, with larger capacities. That’s not enough, then Very Large Scale Integrated (VLSI) circuits replaced LSI circuits. The Intel 4004 chip, developed in 1971, located all the components of the pc from the central processing unit and memory to input/ output controls on one chip and allowed the dimensions to reduce drastically. VLSI placed several hundred thousand transistors on a single silicon chip. This silicon chip is known as the micro processor.

Technologies like multiprocessing, multiprogramming, time-sharing, operating speed, and virtual memory made it a more user-friendly and customary device. The concept of private computers and computer networks came into being within the fourth generation.

Microprocessor

Characteristics of Fourth-Generation  Computers

Fifth generation computers.

The technology behind the fifth generation of computers is AI. It allows computers to behave like humans. It is often seen in programs like voice recognition, area of medicine, and entertainment. Within the field of game playing also it’s shown remarkable performance where computers are capable of beating human competitors.

The speed is the highest, size is the smallest and area of use has remarkably increased within the fifth generation computers. Though not a hundred percent AI has been achieved to date but keeping in sight the present developments, it is often said that this dream also will become a reality very soon.

To summarize the features of varied generations of computers, it is often said that a big improvement has been seen so far because of the speed and accuracy of functioning care, but if we mention the dimensions, it’s been small over the years. The value is additionally diminishing and reliability is increasing.

AI-Based Computers

Characteristics of Fifth-Generation Computers

Faqs on generations of computer, 1. what are the 5 types of generation of computer.

The five generations of computers are: 1. First Generation (1940s-1950s): Characterized by vacuum tubes and punched cards. Examples: ENIAC, UNIVAC. 2. Second Generation (1950s-1960s): Transistors replaced vacuum tubes, allowing smaller and more efficient computers. Introduction of high-level programming languages. Examples: IBM 1401, IBM 7094. 3. Third Generation (1960s-1970s): Integrated circuits (ICs) replaced transistors, leading to smaller and faster computers. Introduction of operating systems. Examples: IBM System/360, DEC PDP-11. 4. Fourth Generation (1970s-1980s): Microprocessors brought computing power to individual users. Introduction of personal computers. Examples: IBM PC, Apple Macintosh. 5. Fifth Generation (1980s-Present): Focus on parallel processing, artificial intelligence (AI), and natural language processing. Development of supercomputers and expert systems. Ongoing advancements in AI and machine learning. Examples: IBM Watson, Google’s DeepMind.

2. What is Gen Z technology?

Gen Z technology encompasses the digital tools and platforms that define the experiences of individuals born roughly between the mid-1990s and early 2010s. This generation is characterized by its seamless integration of smartphones, social media, online collaboration, and video content into daily life, shaping their communication, learning, and entertainment habits.

3. What is Artificial Intelligence?

Artificial Intelligence (AI) is the simulation of human intelligence in machines. It involves programming computers to think, learn, and perform tasks that traditionally require human intelligence, such as problem-solving and decision-making. AI encompasses subfields like machine learning and natural language processing, with applications ranging from virtual assistants to autonomous vehicles.

4. What was the First Computer?

The ENIAC (Electronic Numerical Integrator and Computer), completed in 1945, is widely regarded as the first electronic general-purpose computer.

5. Who is Known as the Father of Computers?

Charles Babbage is known as the Father of Computers for his pioneering work on the concept of a programmable mechanical computer in the 19th century.

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Fifth Generation Of Computer PowerPoint PPT Presentations

Generations of the Computer

Sep 26, 2014

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Generations of the Computer. First Generation 1946 - 1959. First Generation (1946 – 1959). Key Component – Vacuum Tubes Very large and bulky No memory Programmed in Machine Language Very expensive to run Used great amounts of power In constant repair Not reliable Input – Punch cards.

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First Generation1946 - 1959

First Generation (1946 – 1959) • Key Component – Vacuum Tubes • Very large and bulky • No memory • Programmed in Machine Language • Very expensive to run • Used great amounts of power • In constant repair • Not reliable • Input – Punch cards

Vacuum Tubes • Vacuum tubes are sealed glass used in electronic circuitry to control the electrons sealed inside the tubes. • They are used for: the amplification of weak currents, rectification of an altering current to direct current (AC to DC), generating of oscillating radio-frequency power for radio, radar, and more. • Some of the earliest forms of a vacuum tube were recorded in the late 17th century but it wasn’t until 1850 when they created sophisticated versions of vacuum tubes. • Some of the first computers were made out of vacuum tubes. (1946)

Second Generation1959 - 1965

Second Generation (1959 – 1965) • Key Component – Transistors • Getting smaller & faster • Built for “Specific” purposes • Has memory • Magnetic tape replaces Punch cards • High-level computer languages (people-oriented such as BASIC & COBOL) • First commercial computers • Can only do 1 program at time

Created by Julius Edgar Lilienfeld. The transistor is a semiconductor used to amplify a switches electronic signals. Transistors are made with a semiconductor material with at least three terminals. They can be built very compact, more than 1,000,000 per square centimeter on a silicon chip. Replaced vacuum tubes. Patented-1925 Used on the telephone-1947 Used on computers late 1950’s through 1960’s. Transistor Transistors are what we use to make the computer code of 1’s and 0’s much faster. They can be switched on and off very rapidly by switching every 0.000000001 Seconds. • By:Chris Woof

Third Generation1965 - 1971

Third Generation (1965 – 1971) • Key Component – Integrated or Etched Circuitry • Mini-computers • Operating speeds measured in billionth of a second • Multi-processing • Keyboards • ‘Computer Literacy’ begins

Fourth Generation1971 -

Fourth Generation (1971 - ) • Key Component – Microprocessors (Micro Chips) • Micro-computers (Personal computers) • Can be mass-produced • Data communication networks (Internet)

Microprocessor • The microprocessor is also known as the CPU (or the brain of the computer). • It is connected to the circuit board.

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Generations of Faith

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