History of Computer
First Computer Programmer
• In 1840, Augusta Ada Byron
suggests to Babbage that he use
the binary system.
• She writes programs for the
Analytical Engine
Scheutzian Calculation Engine
• Invented by Per Georg Scheutz in
1843.
• Based on Charles Babbage's
difference engine.
• The first printing calculator.
Computer Generations
There are five generations of computer:
• First generation – 1946 - 1958
• Second generation – 1959 - 1964
• Third generation – 1965 - 1970
• Fourth generation – 1971 - today
• Fifth generation – Today to future
The First Generation
• The first computers used vacuum
tubes for circuitry and magnetic
drums for memory, and were often
enormous, taking up entire rooms.
• 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 Second Generation
• Transistors replaced vacuum tubes
and ushered in the second generation
of computers.
• One transistor replaced the
equivalent of 40 vacuum tubes.
• Allowing computers to become
smaller, faster, cheaper, more
energy-efficient and more reliable.
• Still generated a great deal of heat
that can damage the computer.
The Third Generation
• The development of the integrated
circuit was the hallmark of the third
generation of computers.
• Transistors were miniaturized and
placed on silicon chips, called
semiconductors, which drastically
increased the speed and efficiency of
computers.
• Much smaller and cheaper compare
to the second generation computers.
• It could carry out instructions in
billionths of a second.
The Fourth Generation
• The microprocessor brought the
fourth generation of computers, as
thousands of integrated circuits
were built onto a single silicon chip.
• As these small computers became
more powerful, they could be linked
together to form networks, which
eventually led to the development
of the Internet.
• Fourth generation computers also
saw the development of GUIs, the
mouse and handheld devices.
The Fifth Generation
• Based on Artificial Intelligence (AI).
• Still in development.
• The use of parallel processing and superconductors
is helping to make artificial intelligence a reality.
• The goal is to develop devices that respond to
natural language input and are capable of learning
and self-organization.
• There are some applications, such as voice
recognition, that are being used today.