Lesson 13   computer systems software
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Lesson 13 computer systems software

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    Lesson 13   computer systems software Lesson 13 computer systems software Presentation Transcript

    • Computer Systems Software
      Lesson 13
    • Wordprocessing
      A term coined to emphasize the manipulation of certain type of data – characters combined to form words, sentences, paragraphs, memos , letters, and reports.
      Deals with words. These are words which originate through machines, shorthand dictation, oral and written instructions or a rough draft copy.
    • Types of Word Processing Systems
      Stand-alone Units
      Simply refers to a machine that at one work station contains all components necessary for word processing.
      It may be classified as either hard copy or display devices.
      • Editing typewriter
    • Types of Word Processing Systems
      Most stand-alone display word processing systems consists of the following :
      • Typewriter – keyboard
      • CRT
      • Central processor
      • Storage unit
      • Printer
      Cluster Systems
      It may either shared-logic or distributed-logic capabilities
    • Types of Word Processing Systems
      Shared-logic clustered word processing involves a number of essentially “ dumb terminals” linked electronically and sharing the capabilities and storage of one CPU.
      • It can serve as a communication tool to deliver inter-office reports and messages.
      Distributed-logic cluster word processing system - the intelligence within the system resided in the terminals attached to the CPU
      • The sharing that is done is basically of other I/O devices and of mutually accessible storage.
    • Capabilities of Word Processors
      Automatic Functions
      Automatic carrier return at the end of a line
      Automatic centering of headings
      Single keystroke underscoring of a word or line
      Automatic decimal alignment of columns and numbers
      Storage functions
      Memory is defined as the total amount if information a unit or system can store and be available for immediate recall at the operator’s
    • Capabilities of Word Processors
      Option.
      Besides test you can record instructions such as spaces , carrier returns, required tabs , stop codes, hypens , etc.
      The processor can save and retrieve input
      Storage devices , such as cards , cassettes, tapes, or diskettes are essentially removable memory.
    • Capabilities of Word Processors
      Display Functions
      It allows one to see what has been keyed in before it is printed.
      The display allows the operator to review and edit up to several pages of text before printing unto a hard copy
      Communication Functions
      The capability of electronic communication of data between WPs is revolutionizing the work environment
    • Capabilities of Word Processors
      It is now possible for a number of stand-alone machines to be directly connected to each other forming a communication network capable of transmitting messages and documents from one machine to another.
      Sophisticated Functions
      It has the ability to check words in a document against a preprogrammed dictionary and indicate words that do not match and therefore might be mispelled.
    • Programming Functions
      Since WP is really a specialized computer, most WPs can also be designed to be programmable and perform non-word processing tasks involving conventional data processing.
      Many WPs can accept instructions in programming languages.
    • Word Processing Software