Lesson 13 computer systems softwarePresentation 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.
Types of Word Processing Systems Most stand-alone display word processing systems consists of the following :
Typewriter – keyboard
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.