A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The original may modify the copies or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable medium such as a floppy disk, CD, or USB drive. Additionally, viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. A Trojan horse is a file that appears harmless until executed. In contrast to viruses, Trojan horses do not insert their code into other computer files. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms. Furthermore, some sources use an alternative terminology in which a virus is any form of self-replicating malware. The term comes from the term virus in biology. A computer virus reproduces by making (possibly modified) copies of itself in the computer's memory, storage, or over a network. This is similar to the way a biological virus works. Some viruses are programmed to damage the computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and perhaps make their presence known by presenting text, video, or audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss. There are many viruses operating in the general Internet today, and new ones are discovered every day.
Thursday, July 12, 2007
Computer World
COMPUTER
A computer is a machine for manipulating data according to a list of instructions.Computers take numerous physical forms. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers. Today, computers can be made small enough to fit into a wrist watch and be powered from a watch battery. Society has come to recognize personal computers and their portable equivalent, the laptop computer, as icons of the information age; they are what most people think of as "a computer". However, the most common form of computer in use today is by far the embedded computer. Embedded computers are small, simple devices that are often used to control other devices—for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and even children's toys.
LEADING IN COMPUTER'S MANUFACTURE ARE COMPANIES LIKE APPLE AND MICROSOFT
MICROSOFT
Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is an American multinational computer technology corporation with global annual revenue of US$44.28 billion and 76,000 employees in 102 countries. It develops, manufactures, licenses, and supports a wide range of software products for computing devices.Headquartered in Redmond, Washington, USA, its best selling products are the Microsoft Windows operating system and the Microsoft Office suite of productivity software. The company's name is sometimes abbreviated as MS or MSFT.
These products have all achieved near-ubiquity in the desktop computer market. One commentator notes that Microsoft's original mission was "a computer on every desk and in every home, running Microsoft software"—it is a goal near fulfillment.Microsoft possesses footholds in other markets, with assets such as the MSNBC cable television network, the MSN Internet portal, and the Microsoft Encarta multimedia encyclopedia. The company also markets both computer hardware products such as the Microsoft mouse as well as home entertainment products such as the Xbox, Xbox 360, Zune, and MSN TV.
INTEL CORE DUO
Intel Core is the name used for the 32-bit processor codenamed Yonah (Hebrew יונה), released on January 5, 2006. The "Intel Core" name denoted the first Intel processors for mobile devices which were available with two cores packaged on a single silicon chip. The Intel Core brand replaced the Pentium M brand used for earlier mobile processors with a similar microarchitecture. Despite its name, the Intel Core (Yonah) is more similar to the Pentium M than to the Intel Core 2. There was a major rebranding effort by Intel starting January 2006, but in fact some computers with Yonah cores continued to be marketed as Pentium computers. The next generation of desktop and mobile processors after the Intel Core processor is the 64-bit Intel Core 2.
LOANA loan is a type of debt. All material things can be lent but this article focuses exclusively on monetary loans. Like all debt instruments, a loan entails the redistribution of financial assets over time, between the lender and the borrower.THE borrower initially receives an amount of money from the lender, which they pay back, usually but not always in regular installments, to the lender. This service is generally provided at a cost, referred to as interest on the debt. A borrower may be subject to certain restrictions known as loan covenants under the terms of the loan.Acting as a provider of loans is one of the principal tasks for financial institutions. For other institutions, issuing of debt contracts such as bonds is a typical source of funding. Bank loans and credit are one way to increase the money supply.Legally, a loan is a contractual promise of a debtor to repay a sum of money in exchange for the promise of a creditor to give another sum of money.
Thursday, July 12, 2007
Computer World
COMPUTER
A computer is a machine for manipulating data according to a list of instructions.Computers take numerous physical forms. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers. Today, computers can be made small enough to fit into a wrist watch and be powered from a watch battery. Society has come to recognize personal computers and their portable equivalent, the laptop computer, as icons of the information age; they are what most people think of as "a computer". However, the most common form of computer in use today is by far the embedded computer. Embedded computers are small, simple devices that are often used to control other devices—for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and even children's toys.
LEADING IN COMPUTER'S MANUFACTURE ARE COMPANIES LIKE APPLE AND MICROSOFT
MICROSOFT
Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is an American multinational computer technology corporation with global annual revenue of US$44.28 billion and 76,000 employees in 102 countries. It develops, manufactures, licenses, and supports a wide range of software products for computing devices.Headquartered in Redmond, Washington, USA, its best selling products are the Microsoft Windows operating system and the Microsoft Office suite of productivity software. The company's name is sometimes abbreviated as MS or MSFT.
These products have all achieved near-ubiquity in the desktop computer market. One commentator notes that Microsoft's original mission was "a computer on every desk and in every home, running Microsoft software"—it is a goal near fulfillment.Microsoft possesses footholds in other markets, with assets such as the MSNBC cable television network, the MSN Internet portal, and the Microsoft Encarta multimedia encyclopedia. The company also markets both computer hardware products such as the Microsoft mouse as well as home entertainment products such as the Xbox, Xbox 360, Zune, and MSN TV.
INTEL CORE DUO
Intel Core is the name used for the 32-bit processor codenamed Yonah (Hebrew יונה), released on January 5, 2006. The "Intel Core" name denoted the first Intel processors for mobile devices which were available with two cores packaged on a single silicon chip. The Intel Core brand replaced the Pentium M brand used for earlier mobile processors with a similar microarchitecture. Despite its name, the Intel Core (Yonah) is more similar to the Pentium M than to the Intel Core 2. There was a major rebranding effort by Intel starting January 2006, but in fact some computers with Yonah cores continued to be marketed as Pentium computers. The next generation of desktop and mobile processors after the Intel Core processor is the 64-bit Intel Core 2.
LOANA loan is a type of debt. All material things can be lent but this article focuses exclusively on monetary loans. Like all debt instruments, a loan entails the redistribution of financial assets over time, between the lender and the borrower.THE borrower initially receives an amount of money from the lender, which they pay back, usually but not always in regular installments, to the lender. This service is generally provided at a cost, referred to as interest on the debt. A borrower may be subject to certain restrictions known as loan covenants under the terms of the loan.Acting as a provider of loans is one of the principal tasks for financial institutions. For other institutions, issuing of debt contracts such as bonds is a typical source of funding. Bank loans and credit are one way to increase the money supply.Legally, a loan is a contractual promise of a debtor to repay a sum of money in exchange for the promise of a creditor to give another sum of money.
