1968‚ a similar system was developed in the USA which went into operation at the US Defence Department’s Advanced Research Projects Agency (ARPA) in 1969. ARPA‚ also called ARPANET‚ used Network Control Protocol (NCP) as its transmission protocol from 1969 to 1982‚ when NCP was replaced with the now widespread TCP-IP (Transmission Control Protocol - Internet Protocol). With the technology in place‚ the question was what to do with it! A number of interconnected US military computers formed the first
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words. Computer virus A computer virus is an executable program. Depend on the nature of a virus‚ it may cause damage of your hard disk contents‚ and/or interfere normal operation of your computer. By definition‚ a virus program is able to replicate itself. This means that the virus multiplies on a computer by making copies of itself. This replication is intentional; it is part of the virus program. In most cases‚ if a file that contains virus is executed or copied onto another computer‚ then that
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Computer Information Systems Summary Once upon a time‚ way back when in the caveman era‚ caveman used drawings on walls to keep track of information and to communicate with each other in the clan of one ’s life-span. Over time‚ man have improved and evolved in the way of keeping track of information and communicating with one another. Today‚ one finds himself more in an automated world than he did 25 years ago. When planning to purchase a computer‚ one must take in consideration all possibilities
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The role of computer in teaching and learning is pivotal. You can’t now deny the fact that what we people are teaching and learning is all now through computers. Computer is fast and efficient and fetches information in the milliseconds or even more than that. Now you are learning online. There are virtual classrooms. You can get learning material on the internet. You can now even give papers on the internet. All education processes are now on computers. Computer is a remarkable device with much
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Mobile os Vs Desktop os Android was designed from the ground up as an operating system (OS) for mobile devices. Its built-in application and memory-management systems were engineered with battery life as one of the most critical concerns. The Android OS does not work like a desktop operating system. On a desktop OS‚ like Windows‚ Mac OS X‚ or Ubuntu Linux‚ the user is responsible for closing programs in order to keep a reasonable amount of memory available. On Android‚ this is not the case. The
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Informatica 29 (2005) 233–240 233 A Survey of Contemporary Real-time Operating Systems S. Baskiyar‚ Ph.D. and N. Meghanathan Dept. of Computer Science and Software Engineering Auburn University Auburn‚ AL 36849‚ USA baskiyar@eng.auburn.edu http://www.eng.auburn.edu/~baskiyar Keywords: scheduling‚ POSIX‚ kernels. Received: June 26‚ 2004 A real-time operating system (RTOS) supports applications that must meet deadlines in addition to providing logically correct results. This paper reviews
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Components of a Computer System A computer system consists of both hardware and information stored on hardware. Information stored on computer hardware is often called software. The hardware components of a computer system are the electronic and mechanical parts. The software components of a computer system are the data and the computer programs. The major hardware components of a computer system are: Input devices: Keyboard‚ mouse‚ scanner‚ digital camera and joystick. Peripheral device used
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Military Computer Systems History : By Bilal At the outset of computer engineering development in the USSR in the 1950s the main attention was concentrated on the creation of computers which could solve complex mathematical problems. Computers then were stationary and intended for successive or batch problem solution irrelatively to the real time and dynamic parameter changes. Later the machines formed the most widespread class of universal computers for various applications. By the late
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October 2012 Evaluating a Computer System Judging the effectiveness of a computer system has taken on a new dimension in the past few years‚ if for no other reason than the wide range of computer systems from which the user can select. It is‚ therefore‚ important that we investigate the criteria that should be considered in making this important decision. Probably the obvious criterion to be considered when one purchases a computer system is speed. The value of a computer is directly related to its
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and disadvantages of at least three different measures used to protect operating systems? 2. The ease of implementation of the measures. 3. The associated security management issues related to measures discussed above. 4. The ranking of the measures from best to worst with supporting rationale Answer Antivirus: Antivirus is the easiest protective measure that can be implemented on an operating system‚ and is also usually very easy to maintain. An update schedule is scheduled‚ or the
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