Lesson 13 computer systems software


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Lesson 13 computer systems software

  1. 1. Computer Systems Software<br />Lesson 13<br />
  2. 2. Wordprocessing<br />A term coined to emphasize the manipulation of certain type of data – characters combined to form words, sentences, paragraphs, memos , letters, and reports.<br />Deals with words. These are words which originate through machines, shorthand dictation, oral and written instructions or a rough draft copy.<br />
  3. 3. Types of Word Processing Systems<br />Stand-alone Units <br />Simply refers to a machine that at one work station contains all components necessary for word processing.<br />It may be classified as either hard copy or display devices.<br /><ul><li>Editing typewriter</li></li></ul><li>Types of Word Processing Systems<br />Most stand-alone display word processing systems consists of the following :<br /><ul><li>Typewriter – keyboard
  4. 4. CRT
  5. 5. Central processor
  6. 6. Storage unit
  7. 7. Printer</li></ul>Cluster Systems <br />It may either shared-logic or distributed-logic capabilities<br />
  8. 8. Types of Word Processing Systems<br />Shared-logic clustered word processing involves a number of essentially “ dumb terminals” linked electronically and sharing the capabilities and storage of one CPU. <br /><ul><li>It can serve as a communication tool to deliver inter-office reports and messages. </li></ul>Distributed-logic cluster word processing system - the intelligence within the system resided in the terminals attached to the CPU<br /><ul><li>The sharing that is done is basically of other I/O devices and of mutually accessible storage.</li></li></ul><li>Capabilities of Word Processors<br />Automatic Functions<br />Automatic carrier return at the end of a line<br />Automatic centering of headings<br />Single keystroke underscoring of a word or line<br />Automatic decimal alignment of columns and numbers <br />Storage functions<br />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<br />
  9. 9. Capabilities of Word Processors<br />Option.<br />Besides test you can record instructions such as spaces , carrier returns, required tabs , stop codes, hypens , etc.<br />The processor can save and retrieve input<br />Storage devices , such as cards , cassettes, tapes, or diskettes are essentially removable memory.<br />
  10. 10. Capabilities of Word Processors<br />Display Functions<br />It allows one to see what has been keyed in before it is printed.<br />The display allows the operator to review and edit up to several pages of text before printing unto a hard copy<br />Communication Functions <br />The capability of electronic communication of data between WPs is revolutionizing the work environment <br />
  11. 11. Capabilities of Word Processors<br />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. <br />Sophisticated Functions<br />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.<br />
  12. 12. Programming Functions<br />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.<br />Many WPs can accept instructions in programming languages.<br />
  13. 13. Word Processing Software<br />