What are the generations of operating
system?
Answer
There are five generations of operating systems.
These can be described as follows:
The First Generation ( 1945 - 1955 ): Vacuum
Tubes and Plugboards
Digital computers were not
constructed until the Second World War. Calculating engines with mechanical
relays were built at that time.
These early computers were
designed, built and maintained by a single group of people. First generation
uses vacuum Tube technologies. These are large and heavy computers with small and
low processing power.
By the 1950’s punch cards were
introduced and this improved the computer system. Instead of using plugboards,
programs were written on cards and read into the system.
The Second Generation ( 1955 - 1965 ):
Transistors and Batch Systems
Transistors led to the development
of the computer systems that could be manufactured and sold to paying
customers. These machines were known as mainframes and were locked in air-conditioned
computer rooms with staff to operate them.
The Batch System was introduced to
reduce the wasted time in the computer. A tray full of jobs was collected in
the input room and read into the magnetic tape.
The Third Generation ( 1965 - 1980 ):
Integrated Circuits and Multiprogramming
Until the 1960’s, there were two
types of computer systems i.e the scientific and the commercial computers.
These were combined by IBM in the System/360. This used integrated circuits and
provided a major price and performance advantage over the second generation
systems.
The third generation operating
systems also introduced multiprogramming. This meant that the processor was not
idle while a job was completing its I/O operation. Another job was scheduled on
the processor so that its time would not be wasted.
The Fourth Generation ( 1980 - Present ):
Personal Computers
Personal Computers were easy to
create with the development of large-scale integrated circuits. These were
chips containing thousands of transistors on a square centimeter of silicon.
Because of these, microcomputers were much cheaper than minicomputers.
Fifth Generation: Artificial
Intelligence: (Present and Beyond)
Fifth generation computing devices,
based on artificial intelligence, are still in development, though there are
some applications, such as voice recognition, that are being used today. The
use of parallel processing and superconductors is helping to make artificial
intelligence a reality.
What is ARM and Intel?
Answer
ARM
The architect of the Smartphone
era, ARM authors the instruction sets and blueprint core designs for mobile
systems-on-a-chip, which companies like Qualcomm, Apple, Samsung, and (until
recently) Huawei then license and develop into products that power iPhones,
Galaxys, and Pixels. The newly unveiled Cortex-A77 CPU and Mali-G77 GPU are
refreshingly simple in that they’re all about increasing performance and
efficiency without doing much in the way of adding features or specialist
capabilities.
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