Joyce Niko D. Perez IV- RIZAL
A. Significant LearningsIn this week, we discussed about the Third and Fourth Generations of computers. These two generations are very different from the "primitive" ones because during these two periods scientists and many computer wizards innovate and had come up with very great inventions. On the other hand the primitive generations are still important because without those past generations, there would be no basis for present or modern-day scientific breakthroughs.
The Third generation computers ranged from 1963 to 1974. During this period, individual transistors were replaced by integrated circuits.
In electronics, an integrated circuit (also known as IC, microcircuit, microchip, silicon chip, or chip) is a miniaturized electronic circuit (consisting mainly of semiconductor devices, as well as passive components) that has been manufactured in the surface of a thin substrate of semiconductor material.
A hybrid integrated circuit is a miniaturized electronic circuit constructed of individual semiconductor devices, as well as passive components, bonded to a substrate or circuit board.
Magnetic tape and disks completely replaced punchcards. Magnetic tape is a medium for magnetic recording generally consisting of a thin magnetizable coating on a long and narrow strip of plastic. Nearly all recording tape is of this type, whether used for recording audio or video or for computer data storage. It was originally developed in Germany, based on the concept of magnetic wire recording. Devices that record and playback audio and video using magnetic tape are generally called tape recorders and video tape recorders respectively. A device that stores computer data on magnetic tape can be called a tape drive, a tape unit, or a streamer.
Magnetic core internal memories began to give way to new form, Metal-Oxide Semiconductors.
In 1959, the integrated circuit was invented by Jack Kilby of Texas Instruments[1] and Robert Noyce of Fairchild Semiconductor [2] independently around the same time. Kilby recorded his initial ideas concerning the integrated circuit in July 1958 and successfully demonstrated the first working integrated circuit on September 12, 1958.[3] Kilby won the 2000 Nobel Prize in Physics for his part of the invention of the integrated circuit.[4] Robert Noyce also came up with his own idea of integrated circuit, half a year later than Kilby. Noyce's chip had solved many practical problems that the microchip developed by Kilby had not. Noyce's chip, made at Fairchild, was made of silicon, whereas Kilby's chip was made of germanium.
In 1969, the ARPANET (Advanced Research Projects Agency Network) developed by ARPA of the United States Department of Defense, was the world's first operational packet switching network, and the predecessor of the global Internet.
Packet switching, now the dominant basis for both data and voice communication worldwide, was a new and important concept in data communications. Previously, data communication was based on the idea of circuit switching, as in the old typical telephone circuit, where a dedicated circuit is tied up for the duration of the call and communication is only possible with the single party on the other end of the circuit.
In computing, C is a general-purpose, block structured, procedural, imperative computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone LaboratoriesUnix operating system. for use with the
Although C was designed for implementing system software, it is also widely used for applications. It is widely used on a great many different software platforms and computer architectures, and several popular compilers exist.
C has greatly influenced many other popular languages, especially C++, which was originally designed as an extension to C.
The Fourth generation of computers ranged from 1979 up to the present. Intel Corporation designed the first tiny computer on a chip, it was called the microprocessor. A microprocessor incorporates most or all of the functions of a central processing unit (CPU) on a single integrated circuit (IC).The first microprocessors emerged in the early 1970s and were used for electronic calculators, using BCD arithmetics on 4-bit words. Other embedded uses of 4 and 8-bit microprocessors, such as terminals, printers, various kinds of automation etc, followed rather quickly. Affordable 8-bit microprocessors with 16-bit addressing also led to the first general purpose microcomputers in the mid-1970s.
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In 1975, Micro Instrumentation and Telemetry Systems or MITS produced the first PC. They named the computer kit Altair 8080, after the Star Trek episode, “A Voyage to Altair”. Following the launch of the Altair 8800, William Henry Gates III, (called Bill Gates) called the creators of the new microcomputer, Micro Instrumentation and Telemetry Systems (MITS), offering to demonstrate an implementation of the BASIC programming language for the system. After the demonstration, MITS agreed to distribute Altair BASIC. Gates left Harvard University, moved to Albuquerque, New Mexico where MITS was located, and founded Microsoft there. The company's first international office was founded on November 1, 1978, in Japan, entitled "ASCII Microsoft" (now called "Microsoft Japan"). On January 1, 1979, the company moved from Albuquerque to a new home in Bellevue, Washington. Steve Ballmer joined the company on June 11, 1980, and later succeeded Bill Gates as CEO
In April 1976, Steve Jobs and Steve Wozniak founded APPLE COMPUTERS. In 1978, Visicalc is released. This is the first spreadsheet program and it made microcomputers useful to business.
In 1979, The first microcomputer word processor, Word Star, is released.