what is information system?

what is information system?

INFORMATION SYSTEM DEVELOPMENT early information system were designed to be operated by information professionals, and they frequently did n... 01:20

INFORMATION SYSTEM DEVELOPMENT
early information system were designed to be operated by information professionals, and they frequently did not attain their stated social purpose. modern information system are increasingly used by persons who have little or on previous hands-on experience with information technology but who possess a much better perception about what this technology should accomplish  in their professional and personal environments . a correct understanding of the requirements, preferences, and "information styles" of these end users is crucial to the design and cause of today's information systems.

the principal objective of the systems analysis phase is the specification of what the system is required to do. in the system design phase such specifications are converted to a hierarchy of increasingly detailed charts that define the data required and decompose the processes to be carried out on data  to a level at which they can be expressed as instruction of a computer program. the system development phase consist of writing and testing computer software and of developing data input and output forms and convention. systems implementation is the installation of a physical system convention.

what is internet browsing and E-mail?

what is internet browsing and E-mail?

INTERNET BROWSING AND E-MAIL              INTRODUCTION TO INTERNET the global phenomenon of the internet has changed the way businesses ind... 21:01

INTERNET BROWSING AND E-MAIL
             INTRODUCTION TO INTERNET
the global phenomenon of the internet has changed the way businesses individuals access and use information. as both a powerful communication tools and a comprehensive data repository, the internet has quickly become a necessity in today's business environment. therefore, it is important to understand what the internet offers and who you can connect individual windows computers or your entire network to it.

the internet's roots can be tracer back to the late 1960s, when the advanced research project agency or AR PA,under the us department of defense designed  network to safeguard military information stored on computers all over the country. originally called ARPANET,this network connected strategically located computers so that if one link were destroyed by an attack on natural disaster, surviving computers could continue to communicate with each other.
in 1985, the national science foundation(NSF) funded several national supercomputer centers and enabled regional and university computer centers to connect to them.the initial motivation to connect these was the availability of remote access to these supercomputer resources.  this event market the birth of the internet as we know it today.

what is application and use of computer?explain.

what is application and use of computer?explain.

APPLICATION AND USE OF COMPUTERS in general, human beings can do whatever computers can do but computers can do it with much greater speed a... 05:26

APPLICATION AND USE OF COMPUTERS
in general, human beings can do whatever computers can do but computers can do it with much greater speed and accuracy. this is in spite of the fact that computers preform all their calculations and operations  one step at a time. for example ,a human being can take a list of 10 numbers and find their sum all in one operation by listing the numbers one over the other and adding them column. a computer, on the other hand, can add numbers only two at a time, so adding this same list of numbers will take nine actual addition steps. of course, the fact that the computer requires only a nanosecond or less per step, makes up for this apparent inefficiency.

a computer is faster and more accurate then people but unlike most people it has to be given a complete set of instruction that till it exactly what to do at each step of operation. Thai set of instruction, called a program, is prepared by one or more persons for each job, the computer has to do. these programs are placed in the computer's memory unit in binary-coded from, with each instruction having a unique code. the computer takes these instruction codes from the memory one at a time and performs the operation called for by this code.
computers have found their way into application areas that were not feasible 20 years ago. the rapid increase in the number and variety of computer application has made them significant part of our lives. the following sections present examples from some of the major areas of application

.

what is computer architecture?

what is computer architecture?

         Computer Architecture a computer is a machine that processes information. what we mean by "processes" is that the informa... 22:56

        Computer Architecture
a computer is a machine that processes information. what we mean by "processes" is that the information put into the computer has something done to it.sometime the computer is asked to do calculations with the information. sometime we ask the computer just to store the information so that it can be easily found when we need it. computers have the capabilities to store and process a large amount of information at extremely high speed and produce highly accurate results. computer can work 24 hours a day and can do some jobs that would be impossible without them.
the 10 years has seen a computer revolution that has produced

computers with speed and computing power thousands of time greater then the first commercial computers while being to larger then  a typewriter. this revolution occurred as a result of integrated circuits that combine many electronic components on a single silicon chip.in particular, large-scale integration(isl) and very-large-scale integration(Vlasic)technologies can put tens of thousands of transistors on a single chip. this has made it possible to fabricate the entire brain of a  computer as a single integrated circuit called a microprocessor. the addition of a relatively small number of other chips produces a complete microcomputer.
from the first digital computers of the 1940s to today's  powerful full-size computers and revolutionary microcomputers, very little change has occurred in the basic principles of operation. although the technology has come a long way from the time when a computer filled a big room and was considered too costly for most applications. modern computers still work with binary numbers (Is and Os) using the same basic logic operations as their predecessors. in this chapter many of the concepts, principles and operations that are common to all types of computers are presented.

what is computer software?

what is computer software?

      computer software computer software can be split into two categories,that is, system software and application software. a) system soft... 21:36

      computer software
computer software can be split into two categories,that is, system software and application software.
a) system software
the system software of a computer consist of a collection of operative program whose purpose is to make the use of the computer more effective. the customer who buys a computer would usually receive, in addition to the hardware, any available software needed for the effective operation of his computer. a computer without some kind of system software would be very ineffective and most likely possible to operate.

b) application software
this is the software that enables us to do the things that we bought our computer for, such as typing a letter, preparing payroll, playing games, writing music or creating  animated displays.
application software is normally supplied as a package, consisting of the following:
. the software, supplied on floppy disk or CD rooms.
. a manual, explaining how to use the software.
. training material, either supplied on disk,CD ROM or in a booklet.

what is development system information?

what is development system information?

INFORMATION SYSTEM DEVELOPMENT early information system were designed to be operated by information professionals, and they frequently did n... 01:13

INFORMATION SYSTEM DEVELOPMENT
early information system were designed to be operated by information professionals, and they frequently did not attain their stated social purpose. modern information system are increasingly used by persons who have little or on previous hands-on experience with information technology but who possess a much better perception about what this technology should accomplish  in their professional and personal environments . a correct understanding of the requirements, preferences, and "information styles" of these end users is crucial to the design and cause of today's information systems.
the principal objective of the systems analysis phase is the specification of what the system is required to do. in the system design phase such specifications are converted to a hierarchy of increasingly detailed charts that define the data required and decompose the processes to be carried out on data  to a level at which they can be expressed as instruction of a computer program. the system development phase consist of writing and testing computer software and of developing data input and output forms and convention. systems implementation is the installation of a physical system convention.

what is computer education?explain.

what is computer education?explain.

                               education the use of computer in education started in the 1970s, with the introduction of microcomputers.the ... 06:09

                               education

the use of computer in education started in the 1970s, with the introduction of microcomputers.the use of computers has become widespread from primary education through the university level.a large variety of tutorial programs are available for teaching various to students. when a tutorial program is used, the student is asked a question by the computer, the student types an answer and then gets an immediate response to the answer, if the answer is correct, the student is asked more challenging questions. if the answer is wrong, various computer messages will indicate the flaw and the program will bypass more complicated question unit the student shows mastery in that area. the use of computer has many advantages in educational instructions. they provide one-to-one intersection with a student, as will as an instantaneous response to the answer given and allow student to proceed at their owe pace. computers are particularly useful in subject that require drill, freeing teacher's time from some classroom tasks so that  a teacher can devote more time to individual student. because of the privacy and individual attention given by a computer, some student are relieved  of the embarrassment of giving an incorrect answer public y or of going more slowly through lessons that other classmates. implementation of computers for educational purpose has some drawbacks, that is, they are expensive to purchase, maintain and update. ready made educational application packages related with various subjects are available for use in school. software can also be developed in-house, that is, a teacher could provide the software exactly tailored to the needs of the students but this is expensive, time-consuming and may require more programming expertise than is available.

what is computer crime?

what is computer crime?

COMPUTER CRIME         computer crime can be defined as any crime that is committed by means of the special knowledge or expert use of compu... 02:12

COMPUTER CRIME

       
computer crime can be defined as any crime that is committed by means of the special knowledge or expert use of computer technology. computer crime became a serious problem in the late 20th century. since the first reported case of computer crime in 1958, computer have been involved in most types of crimes. including theft, burglary, larceny, fraud, embezzlement, extortion, sabotage, espionage, kidnapping and murder. computer system themselves can be the targets of attack, as when a computer virus is surreptitiously introduced into a system to alter or destroy data.breaking into private computer system to destroy, steal or alter information became easier once modems were introduced in the 1960s. technically expert computer hobbyists who use personal computers and modems to break into and temper with computer system are known as"hackers". most serious computer crimes are committed in the banking and financial-service industries where money, credit and other financial assets are recorded in electronic databases and are transmitted as signals over telephone lines. persons with access to such system may falsify or manipulate these records for their own purposes by illegally transferring money balances to their own accounts.

what is browsing web?explain.

what is browsing web?explain.

              BROWSING THE WEB making a leap from one computer's web page to another's is simple matter of clicking a picture or pie... 05:20

             BROWSING THE WEB
making a leap from one computer's web page to another's is simple matter of clicking a picture or piece of text, known as a link, on the screen. such links allow user to interact with documents stored on computers

across the internet as though they were part of a single text. using links to jump from site to site is commonly known as surfing the web.one of the main reasons for the web,s success is its graphical interface which presents colorful typeset pages, graphics,sounds and videos.
programs designer to let you access and navigate the web are known as web browsers. these days, most browsers are more properly called internet browser because they include e-mail capabilities, newsreaders and tools for downloading files. the most widely used browser are Netscape communicators and explorer.
when you first run your browser,you will probably land on a particulars web page. which one will depend on which browser you are using.all the major browser offer some means of storing the names and curls of sites that you like so you can easily  return to them later. in Netscape communicator, these stored site addresses is called bookmarks. in internet explorer, they are called favorites.