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Generations of 
Computers
First generation computers
First generation computers 
(1940-1956) 
The first computers used vacuum tubes for circuitry and 
magnetic drums for memory. 
They were often enormous and taking up entire room. 
First generation computers relied on machine language. 
. They were very expensive to operate and in addition to using 
a great deal of electricity, generated a lot of heat, which was 
often the cause of malfunctions. 
The UNIVAC and ENIAC computers are examples of first-generation 
computing devices.
Second generation computers
Second generation computers 
(1956-1963) 
• Transistors replaced vacuum tubes and ushered in the 
second generation of computers. 
• Second-generation computers moved from 
cryptic binary machine language to symbolic. 
• High-level programming languages were also being 
developed at this time, such as early versions 
of COBOL and FORTRAN. 
• These were also the first computers that stored their 
instructions in their memory.
Third generation computers
Third generation computers 
(1964-1971) 
The development of the integrated circuit was the hallmark of 
the third generation of computers. 
Transistors were miniaturized and placed on siliconchips, 
called semiconductors. 
Instead of punched cards and printouts, users interacted with 
third generation computers through keyboards 
and monitors and interfaced with an operating system. 
Allowed the device to run many different applications at one 
time.
Fourth generation computers
Fourth generation computers 
(1971-present) 
The microprocessor brought the fourth generation of 
computers, as thousands of integrated circuits were built 
onto a single silicon chip. 
The Intel 4004 chip, developed in 1971, located all the 
components of the computer. 
From the central processing unit and memory to 
input/output controls—on a single chip. 
. Fourth generation computers also saw the development 
of GUIs, the mouse and handheld devices.
Fifth generation computers
Fifth generation computers 
(present and beyond) 
Fifth generation computing devices, based on artificial 
intelligence. 
Are still in development, though there are some 
applications, such as voice recognition. 
The use of parallel processing and superconductors is 
helping to make artificial intelligence a reality. 
The goal of fifth-generation computing is to develop devices 
that respond to natural language input and are capable of 
learning and self-organization.
generation of computer
generation of computer

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generation of computer

  • 3. First generation computers (1940-1956) The first computers used vacuum tubes for circuitry and magnetic drums for memory. They were often enormous and taking up entire room. First generation computers relied on machine language. . They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat, which was often the cause of malfunctions. The UNIVAC and ENIAC computers are examples of first-generation computing devices.
  • 5. Second generation computers (1956-1963) • Transistors replaced vacuum tubes and ushered in the second generation of computers. • Second-generation computers moved from cryptic binary machine language to symbolic. • High-level programming languages were also being developed at this time, such as early versions of COBOL and FORTRAN. • These were also the first computers that stored their instructions in their memory.
  • 7. Third generation computers (1964-1971) The development of the integrated circuit was the hallmark of the third generation of computers. Transistors were miniaturized and placed on siliconchips, called semiconductors. Instead of punched cards and printouts, users interacted with third generation computers through keyboards and monitors and interfaced with an operating system. Allowed the device to run many different applications at one time.
  • 9. Fourth generation computers (1971-present) The microprocessor brought the fourth generation of computers, as thousands of integrated circuits were built onto a single silicon chip. The Intel 4004 chip, developed in 1971, located all the components of the computer. From the central processing unit and memory to input/output controls—on a single chip. . Fourth generation computers also saw the development of GUIs, the mouse and handheld devices.
  • 11. Fifth generation computers (present and beyond) Fifth generation computing devices, based on artificial intelligence. Are still in development, though there are some applications, such as voice recognition. The use of parallel processing and superconductors is helping to make artificial intelligence a reality. The goal of fifth-generation computing is to develop devices that respond to natural language input and are capable of learning and self-organization.