• Disk Input and Output

    Over the past 30 years, the increase in the speed of processors and main memory has far outstripped that of disk access, with processor and main memory speeds increasing by about two orders of magnitude compared with one order of magnitude for disk. The result is that the disks are currently at least four orders of magnitude slower than main memory.



  • Process Switching

    At some time, a running process is interrupted and the operating system assigns another process to the running state and turns control over that process.



  • Application Software for Computers

    application software for computers, they consist of programs until a computer how to produce information. Some widely used application software includes personal information manager, Project management, accounting, computer aided design, this.publishing, paint/image editing, audio and video editing, multimedia authoring, webpage authoring, personal finance, legal, and tax preparation, home design/landscaping, educational, reference, and entertainment which include games and simulations etc.



  • Creating Links and Lists

    Creating links and lists in HTML is very fun and demanding. Creating lists and links elements are integral to writing Web pages, but of the two, hyper links are by far the most popular. The World Wide Web thrives on hyper links. Imagining a Web without links, without browsers, without search engines that give lists of hyperlinks of pages that match the search criteria entered. Links are a prime criteria by which your page stands out in the public search of World Wide Web.



  • The Internet

    The world largest network is the Internet, which is a worldwide collection of networks that links together more than 200 million host computers by means of modems, telephone lines, cables and other communication devices and media with an abundance of resources and data accessible via the Internet, more than one billion users around the world are making use of the Internet for a variety of reasons.



  • Process Control Structures

    Consider what the operating system must know if it is to manage and control a process. First, it must know where the process is located, and second, it must know the attributes of the process that are necessary for its management.



  • Location of Encryption Devces

    The most powerful and most common approach to countering the threats is encryption. If encryption is used to counter these threats, then we need to decide what to encrypt and where the encryption gear should be located. There are two fundamental alternatives link encryption and end to end encryption.



  • Key Distribution

    For conventional encryption to work, the two parties or hosts should have the same key, and that key must be protected from access by others. This key may provide encrypted message. Frequent key changes are usually desirable to limit the amount of data compromised if an attacker learns the key. Therefore, the strength of any cryptographic system results with the key distribution technique, a term that refers to the means of delivering a key to two parties that wish to exchange data without allowing others to see the key.



  • Purpose for Using a Computer

    Antony DiNardo of the purpose for which you want to use your computer will help you decide on the type of computer to buy. At this point in your research, it is not necessary to know the exact application software title or version numbers. You might want to use knowing that you plan to use a computer primarily to create word processing, spreadsheet, database, and presentation documents, however, will point you in the direction of a desktop or notebook computer.



  • Process Attributes

    In a sophisticated multiprogramming system, a great deal of information about each process is required for process management. This information can be considered to reside in a process control block. Different systems will organize this information in different ways.