Importance of Computer Literacy Computer literacy is having up to date knowledge of computers and their capabilities. One of the more popular aspects of the computer is the use of the internet. The internet is a worldwide collection of networks that links millions of businesses‚ government agencies‚ educational institutions‚ and individuals. It was originally started by the Pentagon for scientists and military to put information and their studies on a network that was easily shared with one another
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storage media Stores the binary data on a disk or tape coated with a material that can be magnetised differently‚ depending on whether a 0 or 1 is stored. used for tertiary and off-line storage. Data stored in backing storage is permanent so it is NOT lost when the computer is turned off. It is always slower to access data from backing storage than from internal memory. Fixed hard disks A hard-drive built into the case of the computer is known as ‘fixed’. Most computers have one. Fixed hard-drives
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Outline of Memory MEMORY The ability to retain information over time –Active system that receives‚ stores‚ organizes‚ alters‚ and recovers (retrieves) MEMORY The ability to retain information over time –Active system that receives‚ stores‚ organizes‚ alters‚ and recovers (retrieves) THREE STAGES/TYPES OF MEMORY •SENSORY •SHORT TERM (WORKING) •LONG TERM THREE PROCESSES •ENCODING •STORING •RETRIEVING Stages of Memory •SENSORY (IN RAW FORM) –The first stage of memory –Stores an exact copy of incoming
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operations performed by computer system Inputting Storing Processing Outputting Controlling The internal structure of a computer looks like above: Input unit: Input unit links the external environment with the computer system. Data and instruction must be entered to the computer before performing any competition. Data or instructions can be entered through input devices eg. Key board‚ or any other input devices. Input unit transferred this data into binary coded in short input unit performs the
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1. Briefly‚ what is an operating system? An operating system serves as a hardware/software interface‚ acts as a repository for common‚ shared routines and defines a platform for constructing and executing application software. 2. An operating system presents an application programmer with a relatively "friendly" hardware/software interface. What does this mean? Why is it important? The user interface‚ sometimes called the shell‚ provides a mechanism for the user and application programs to communicate
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care‚ furthermore we have a statutory right to safeguard and promote the welfare of children‚ under (section 175 of the Education Act 2002.) Furthermore we have to follow the guidance of ‘Safeguarding’ children/young people within a Safer Recruitment in ‘Education DfES 2007’‚ as the safety and protection of all children/young people are of paramount importance. Safeguarding children/young people‚ under the Children Act of ‘2004’‚ which always defines‚ ‘safeguarding and promoting the welfare’ of
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the End of the following instruction sequence: lease -2‚sp clrb ldaa #20 psha ldaa #$E0 psha ldaa #$E0 psha ldx #$7000 pshx jsr sub_abc ... pshd leas -12‚sp ... E4.15: Write a subroutine to convert an 8-bit signed integer into an ASC11 string that represents a decimal number. The 8-bit integer and the pointer to the buffer to hold the ASC11 string are passed to this subroutine in accumulator B and index register X‚respectively. E4.16: Give an instruction sequence to call the out4hex
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[1]. In order to solve this problem‚ the distributed intrusion detection systems (DIDS) combine all these scattered alerts and make use of their logic relationship‚ thus obtaining additional information. DIDS are currently as necessary as complex‚ due to the fact that they involve several technologies‚ devices and network resources‚ as well as sophisticated management tasks which are beyond the scope of many users or organizations which do not have a highly specialized team of administrators. There
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Certificate Course in Computer Studies Dharmaraja Computer Division – Aluthgama Instructor: Amila Kularathne (B.Sc (Curtin)‚ Na.Dip IT‚ CCNA/S‚ MCTS) This lesson introduces key concepts related to how computers work. Computer related terms are defined and basic computer functions are explained. In particular‚ the following topics are addressed. • What is a computer? • What are the components of a computer? • How does a computer work? • How does the software work? • How does a computer process information
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No Content Page 1 Introduction 2 2 History 3 3 Computer Software 4 4 Computer Hardware 6 5 Function and Application In Medical Field 8 6 Advantage 10 7 Disadvantage 12 8 Precaution 13 9 Conclusion 16 10 Reference 17 INTRODUCTION The first use of the word “computer” was recorded in 1613 in a book called “The yong mans gleanings” by English writer Richard Braithwait. It referred to a person who carried
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