Computer - What Is It?

In: Computers and Technology

Submitted By petvi
Words 1954
Pages 8
------------------------------------------------- omputer From Wikipedia, the free encyclopedia
For other uses, see Computer (disambiguation).
"Computer system" redirects here. For other uses, see Computer system (disambiguation).
"Computer technology" redirects here. For the company, see Computer Technology Limited.

Computer |

|
A computer is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.
Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU) and some form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on stored information. Peripheral devices allow information to be retrieved from an external source, and the result of operations saved and retrieved.
The first electronic digital computers were developed between 1940 and 1945 in the United Kingdom and United States. Originally they were the size of a large room, consuming as much power as several hundred modern personal computers (PCs).[1] In this era mechanical analog computers were used for military applications.
Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space.[2] Simple computers are small enough to fit into mobile devices, and mobile computers can be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". However, the embedded computers found in many devices from MP3 players to fighter aircraft and from toys toindustrial robots are the most numerous.…...

Similar Documents

Computer

...Discovering Computers 2011 Chapter 4 DISCOVERING COMPUTERS 2011 CHAPTER FOUR: THE COMPONENTS OF THE SYSTEM UNIT PROBLEM SOLVING TIP SHEET Use this Tip Sheet as suggested starting points for the Problem Solving exercises. Problem Solving @ Home 1. Malfunctioning Speakers While working on a homework assignment, you decide to listen to one of your favorite music CDs through your computer speakers. The media player program on your computer automatically starts when you insert the CD. Although it looks like the CD is playing, no sound is coming from your speakers. What might be causing this? What is the first step that you will take to correct this problem? The sound might be muted or the volume turned down; adjust accordingly There may be a problem with your computer recognizing the sound card; check the drivers 2. Optical Disc Drive Stuck While using your computer, you attempt to open the optical disc drive to insert an installation disc for a program you wish to install. The drive, however, does not open when you press the eject button. The drive opened a few minutes prior, when you removed a music CD. What steps will you take to open the drive before calling technical support? Restart the computer. If the problem persists after restarting the computer, shut the computer down and insert the end of a paperclip into the small hole in the optical disc drive (if one exists) to open the drive manually. If necessary, check with technical support or your computer’s......

Words: 1370 - Pages: 6

Computer

...Computer and our life Importance of computer: Computer is an important machine in our life. Without computer our life is nothing. We need to use it in every sector of our life. What type of work sector that is we are using computer. It makes our job easier and simple. Computer creates a great opportunity for us. We are changing our life style quickly through computer. We are using it in education sector, medical sector, research and experimental job, designing, architectural designing, planning, public administration and etc. Computer changed our education system. We can learn through long distance education system. Now we do not need to go far from home to learn something. We can save our time and money by this. Without that we are able to get every service at home. Computer is also able to provide us another service. Now doctor can do operations through computer. It resumes risk for a patient. Doctors do not need to work more. Computer also helps us in research like educational, scientific, medical and etc. Really, computer is a great invention of human life. Computer and communication: ------------------------------------------------- Without helping in our work we can communicate through computer. Now-a-days computer is the powerful communication media. Generally it communicates through network and internet is the well known network system. We can talk, chat, mail through computer. We can keep contract with international community by internet. E-mail is a......

Words: 850 - Pages: 4

Computers

...Computers in Our World Our world is constantly evolving. The only thing in life that is constant is change, and Computers are no different. Even though computers have only existed in the last seventy years, many believe computers have changed the world more than any other technological advance. Over the past seventy years, computers have made a quick evolution into our world with several major advancements. Just as with all things, however, there was a beginning to the computer generation. Computers were invented to solve “complex mathematical problems using calculators within a computer(De la Bedoyere,1). Computers now can do anything within a large box. A desktop computer has many external parts joined together. A computer consist of a mother board,the motherboard controls and processes what is typed and clicked and programs running. The middle of the motherboard consist of all the work being processed. Including work and data which is sent through the motherboard to the Central Processor unit (CPU). The computer has to hold memory also to save things within computers. The Ram is a major component in saving information but only works when the computer, is running. The reason a Ram is used is to save and store information,so that when it is being worked on it wont be erased. A Computer also has external and internal drives that can read information. When the computer came out for personal use, it made it better for communication possibilities(ceruzzi,6,7) 1939 was an......

Words: 1404 - Pages: 6

What Is Computer Security?

...Computer security (Also known as cybersecurity or IT Security) is information security as applied to computers and networks. The field covers all the processes and mechanisms by which computer-based equipment, information and services are protected from unintended or unauthorized access, change or destruction. Computer security also includes protection from unplanned events and natural disasters. One way to think of computer security is to reflect security as one of the main features Some of the techniques in this approach include: The principle of least privilege, where each part of the system has only the privileges that are needed for its function. That way even if an attacker gains access to that part, they have only limited access to the whole system. Automated theorem proving to prove the correctness of crucial software subsystems. Code reviews and unit testing are approaches to make modules more secure where formal correctness proofs are not possible. Defense in depth, where the design is such that more than one subsystem needs to be violated to compromise the integrity of the system and the information it holds. Default secure settings, and design to "fail secure" rather than "fail insecure" (see fail-safe for the equivalent in safety engineering). Ideally, a secure system should require a deliberate, conscious, knowledgeable and free decision on the part of legitimate authorities in order to make it insecure. Audit trails tracking system activity, so that......

Words: 286 - Pages: 2

Computer

...Structure and Functions of a Computer "Hardware: the parts of a computer that can be kicked." ~ Jeff Pesis After completing this chapter, you will be able to: 1. Explain the importance of computer literacy. 2. Define the term computer. 3. Identify the components of a computer. 4. Compare the uses of various types of: input devices, output devices, and storage devices. 5. Describe categories of computers and their uses. Structure and Functions of a Computer 1 1.0 Introduction A computer is an electronic machine designed for the storage and processing of data. The machinery is called hardware, and this highly sophisticated equipment needs equally sophisticated programs (called software) to become a working computer system. Modern society has come to depend very heavily on the use of computer systems. Banks, businesses, government departments, industries, shops, people at home and school all rely on computer to play a vital role in their daily activities. These activities are centered on information. In business, the computer system has been used a lot and replaced filing cabinets as means of storing information, and clerical workers as a means of processing it. By storing and processing information on a computer system, these businesses can function more quickly and efficiently, because information can be found and collated much faster. Discovery Learning: A computer was also called a data processor. Why? 1.1 Major Parts and Functions A Computer is an......

Words: 47755 - Pages: 192

Computer

...ROLE OF COMPUTERS About two hundred years before, the word "computer" started to appear in the dictionary. Some people even didn't know what is a computer? However, most of the people today not just knowing what is a computer, but understand how to use a computer. Therefore, computer becomes more and more popular and important to our society. We can use computer everywhere and they are very useful and helpful to our life. Computers have brought about a tremendous revolution in every walk of life and are expected to open more vast fields due to the dexterity of those who design software and those who develop application programs. In a very short period, scientists have been able to extirpate all the defects, the limitations and the shortcoming of computer and much is expected from their ingenuity, acumen and acquisitiveness. The fields of application of computers are various and new applications are being searched out. The scientists applied it to prediction of weather earthquakes, and storms, controlling of satellites and controlling of atomic reactions in reactors and else where. Engineers have not lagged behind. They use computers in designing cars aeroplanes, ships, buildings, bridges and tools etc. In the business world, computers are playing great parts. They are used to word processing, record keeping, inventory controlling, patrol processing, account keeping and auditing, stock marketing and ticket reservations. They are now used to keep personal telephone and......

Words: 658 - Pages: 3

What Is System Forensics and Computer Crime

...1. What questions should you ask and how should you proceed? The questions I would ask would be who, what, where, when, why and how about everything that happened during the period in question. Since the questions are fluid to the situation, I can’t pin point anything specific but I never ask the client if she did it or not. Just ask the client what she was doing on the time specified. I would then document what she said happened in chronological order and then proceed to the investigation. When proceeding with the investigation, the first step is to make a copy of the evidence. You want to have at least two copies of the original evidence (a hash and an image to work with) in case you need a backup for any reason. After that you want to document any findings as accurately and as detailed as possible. Without detailed documentation, courts may not accept the investigative results as vailed or could be torn apart in an examination. While all this is going on, you want to avoid altering the data in any way as this would basically be destroying evidence. You pull the hash by using the command md5sum /dev/hda1 | nc 192.168.0.2 8888 −w 3 as an example. Find the files in question and examine their creation dates, dates accessed and dates last modified. See if those dates match the client’s story and that is about as far as you need to take it. (Easttom, 2014) 2. What is chain of custody and why must it be followed in investigations? The chain of custody is the......

Words: 380 - Pages: 2

Computer

...ASPECTS OF COMPUTER L I T E R A C Y Violence and Technology, are never good bed fellows. 1 2 6/6/2013 Aspects of computer literacy What is a computer?      what are its limitations what is a program (not necessarily how to program) what is a known as hardware? What is known as software? what a computer can and cannot do How computer illiterate am I?  3 6/6/2013 Aspects of computer literacy One problematic element of many (though not all) "computer literacy" or computer education programs is that they may resort too heavily on rote memorization. Students may be taught, for example, how to perform several common functions (e.g.: Open a file, Save a file, Quit the program) in very specific ways, using one specific version of one specific program. 1 06/06/2013 4 6/6/2013 Aspects of computer literacy When a graduate of such a program encounters a competing program, or even a different version of the same program, they may be confused or even frightened by the differences from what they learned. 5 6/6/2013 Aspects of computer literacy This is one reason why major computer and software firms such as Apple Computer and Microsoft consider the educational market important: The often time-limited computer education provided in schools most often lends itself to note memorization, creating a sort of vendor lock-in effect whereby graduates are afraid to switch to competing computer systems. 6 6/6/2013 Aspects of......

Words: 2401 - Pages: 10

Computer

...CHAPTER 1 INTRODUCTION TO INFORMATION TECHNOLOGY 1.1 Introduction Modern civilization has become so complicated and sophisticated that to survive one has to be competitive. This compels people to keep themselves informed of all types of happening in the society. And this in turn entails the need for an infrastructure of information. This is the point where information technology or IT becomes most important, as it is the infrastructure that allows us to get information accurately and in time. Before we define information technology, it is important to understand the notion of Data, Information, Technology, and Knowledge. In everyday conversation, people use the terms data and information interchangeably. However, some computer professional make a distinction between the two terms. Data It is the words, numbers, letters, symbol, sound, video and graphics that describe people, events, things and ideas. It is raw facts about people, objects, and events that have little or no meaning. It is the raw material used to create useful information. It becomes information when you use it as the basis for initiating some action or for making a decision. Information It is defined as the words, numbers, letters, symbol, sound, video and graphics used as the basis for human action or decisions. It is data that have been processed and presented in a form suitable for human interpretation, often with the purpose of revealing trends or patterns that can be used in decision-making. It is data...

Words: 12773 - Pages: 52

What Is Quality Audit? What Constitutes Computer Audit?

...Table of Contents: Question 1A------------------------- Page 3 Question 1B----------------------- Page 5 What is Quality Audit? The principles of Quality Audit, in the sense we mean it here, are based on the style of quality standards used in several formal national and international standards such as the ISO-900x international quality standards. These standards do not in themselves create quality. The logic is as follows. Every organization should define comprehensive procedures by which their products or services can be delivered consistently to the desired level of quality. As was discussed in the section on Quality Management, maximum quality is rarely the desired objective since it can cost too much and take too long. The average product or service provides a sensible compromise between quality and cost. There is also a legitimate market for products that are low cost and low quality. Standards authorities do not seek to make that business judgment and enforce it upon businesses, except where certain minimum standards must be met (eg all cars must have seat belts that meet minimum safety standards, but there is no attempt to define how elegant or comfortable they are). The principle is that each organization should create thorough, controlled procedures for each of its processes. Those procedures should deliver the quality that is sought. The Quality Audit, therefore, only needs to ensure that procedures have been defined, controlled, communicated and used.......

Words: 911 - Pages: 4

What Is a Computer Virus

...What is a computer virus? Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. What do computer viruses do? Through the course of using the Internet and your computer, you may have come in to contact with computer viruses. Many computer viruses are stopped before they can start, but there is still an ever growing concern as to what do computer viruses do and the list of common computer virus symptoms. A computer virus might corrupt or delete data on your computer, use your email program to spread itself to other computers, or even erase everything on your hard disk. Computer viruses are often spread by attachments in email messages or instant messaging messages. That is why it is essential that you never open email attachments unless you know who it's from and you are expecting it. Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files. Computer viruses also spread through downloads on the Internet. They can be hidden in illicit software or other files or programs you might download. To help avoid computer viruses it's essential that you keep your computer current with the latest updates and antivirus tools, stay informed about recent threats, run your computer as a standard user (not as administrator), and that you follow a few basic rules when you surf the Internet, download files, and open attachments. Once a virus is on your......

Words: 272 - Pages: 2

Computer

...ages before, when there were no computers or any other technologies. So much we have advanced that now every information is just a click away and is in your hands 24/7. All this advancement was possible only with the introduction of a small device called the “Computer”. Computers Image Curtsey: csntrust.org.nz/attachments/Image/PC-picture-1.jpg?1367216528141 Basically, computer is a device that accepts the message by the imputer and processes this message and stores the information at the storage devices and later gives an output of the message through the output devices. A simple explanation of the computer. Normally, a computer consists of a processing unit called the Central Processing Unit or the CPU and a form of memory. In the years between 1940 and 1945 were the first electronic digital computers developed. The initial sizes were as big as a room and consumed power as much as today’s personal computers. Initially, computer was related to a person who carries out calculations or computations and as such the word computer was evolved in 1613 and continued till the end of 19th century. Later it as re-described as a machine that carries computations. The early computers were limited in their functions. It was the fusion of automatic calculation and programmability that produced the first computers that were recognized in 1837. Charles Babbage in 1837 was the first to introduce and design a fully programmed mechanical computer, his analytical engine. Due to......

Words: 999 - Pages: 4

What Type of Computer Is Best for You.

...available today. However, with this guide I will pick some computer choices that I believe would benefit a lawyer. If you're planning to only use your laptop for work, than paying attention to graphic card specs is unnecessary. Processing power and RAM should be your primary concern. For lawyers, mid-range processing power should be good enough . Any Intel Core i3 or i5s should be more than enough. As for RAM, more is always better. The bare minimum though is 2GB, but 4GB is ideal. Battery life is the main reason why you shouldn't go overboard with your processor. A powerful chip adds considerable heat and it can also drain your battery much faster. For lawyers, a long battery life is important. You never know when you'll need a power outlet. When it comes to choosing laptops for creative work, art or graphic design, digital painting or 3D modeling, there are a few considerations. If you're just creating 2D work, you can save money by not getting a high-end graphics card. What you get with a high end graphics card is to ability to move around a highly detailed or textured 3D model with no lag. Screen size and resolution will affect your productivity. A resolution of 1920 by 1080 pixels should provide ample working space and still be able to show menus, control palettes. Next consideration is screen size. A larger screen will enable you to see details clearer. Computer skills are becoming a fundamental part of education.......

Words: 411 - Pages: 2

Business Communication - What Factors Influenced the Computer Company’s Decision to Accept the Contract .

...com ARAVIND - 09901366442 – 09902787224 Business Communication Questions: 1. Comment on the appropriateness of the sender’s tone to a customer. 2. Point out the old – fashioned phrases and expressions. 3. Rewrite the reply according to the principles of effective writing in business Questions : 1. What is non – verbal communication ? Why do you suppose that this commercial relies primarily on non-verbal communication between a young man and a gorgeous woman ? What types of non – verbal communication are being used in this case ? 2. Would any of the non-verbal communications in this spot (ad) not work well in another culture ? 3. What role does music play in this spot ? Who is the target market ? 4. Is the music at all distracting from the message ? 5. How else are radio stations advertised on TV ? 1. Analyse the reasons for Arvind Pandey’s dilemma. 2. Does Arvind Pandey really face a dilemma ? 3. In your view what should Arvind Pandey do ? Should he disclose it to his German Vice President ? 1. Comment on the terms and conditions placed by the corporation. 2. What factors influenced the computer company’s decision to accept the contract ? 3. Was it a win – win agreement ? Discuss ? 1. Do you find Mr. Sinha’s responses to various questions effective ? Give reasons for your view on each answer given by Mr. Sinha. 2. Rewrite the responses that you consider most effective to the above questions in a......

Words: 306 - Pages: 2

Business Communication - What Factors Influenced the Computer Company’s Decision to Accept the Contract

...Need Answer Sheet of this Question paper, contact aravind.banakar@gmail.com www.mbacasestudyanswers.com ARAVIND – 09901366442 – 09902787224 BUSINESS COMMUNICATION CASE I: A Reply Sent to an Erring Customer Dear Sir, Your letter of the 23rd, with a cheque for Rs. 25,000/- on account, is to hand. We note what you say as to the difficulty you experience in collecting your outstanding accounts, but we are compelled to remark that we do not think you are treating us with the consideration we have a right to expect. It is true that small remittances have been forwarded from time to time, but the debit balance against you has been steadily increasing during the past twelve months until it now stands at the considerable total of Rs. 85,000/- Having regard to the many years during which you have been a customer of this house and the, generally speaking, satisfactory character of your account, we are reluctant to resort to harsh measures. We must, however, insist that the existing balance should be cleared off by regular installments of say Rs. 10,000/- per month, the first installment to reach us by the 7th. In the meantime you shall pay cash for all further goods; we are allowing you an extra 3% discount in lieu of credit. We shall be glad to hear from you about this arrangement, as otherwise we shall have no alternative but definitely to close your account and place the matter in other hands. Yours truly. ...

Words: 4005 - Pages: 17