A2 ICT OCR Chapter 2 keywords

Chapter 2 : designing computer-based information systems. Key words and definitions. ICT A2 OCR.

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  • Created by: Hayley
  • Created on: 17-11-11 21:11

Chapter 2 Keyword: Batch Processing system.

A processing system that processes batches of data at regular intervals. The amount of data being processed is usually large with the data being of identical type.
-Usually slow, delay recieving output. 
-No user interaction required.
-Usually run on evenings or weekends as this is when the resources aren't required as much.

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Chapter 2 Keyword: Batch processing operating syst

An operating system where a set of tasks are run and completed without any user intervention. The jobs/programs are collected, stored and run at any appropiate time.

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Chapter 2 Keyword: Command line interface

An interface where the computer types commands for the computer to carry out.

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Chapter 2 Keyword: Distributed processing system

A processing system where a number of computers are connected with each computer completing part of the processing. When all the processing has been completed the results are combined to meet the user requiements.

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Chapter 2 Keyword: Forms dialogue

An interface where the computer outputs seperate prompts and response fields for a number of inputs.

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Chapter 2 Keyword: Graphical user interface (GUI)

A user interface based on graphics (icons, pictures and menus) instead of text; uses a mouse as well as a keyboard as a input device.

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Chapter 2 Keyword: Interactive operating system

An operating system where there is direct user interaction while a program is running.

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Chapter 2 Keyword: Interactive processing system

Also known as transtitional processing system. This system handles transactions one at a time with each transaction being fully processed, the response given to the user and any associated files updated before the next transaction is processed. 

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Chapter 2 Keyword: Mental models

An explanation in someone's thought process for how something works in the real world. The mental model of the end user must be considered when designing a a system. 

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Chapter 2 Keyword: Menu/submenu

These enable the user to select an action which may then lead to a submenu  for further choices.

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Chapter 2 Keyword: Model human processor

Developed by Card, Morgan and Newell. This concept attempts to portray the user of a computer system  as a computer including memory and processors.

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Chapter 2 Keyword: Multi tasking operating system

An operating system where the processor is carrying out more than one task at a time, for example word processing and using the internet.

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Chapter 2 Keyword: Natural language interface

A user interface where the user communicates in natural language ('speaks' to the interface). This may be typed or spoken, where the system recognises keywords and the context of the request.

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Chapter 2 Keyword: Real-time operating system

An operating system that has been developed for real-time applications and is typically used for embedded applications (i.e. systems within another application).

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Chapter 2 Keyword: Real time processing system

A processing system that processes data at the time it is required. The data must be handled within a specified maximum time limit. 

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Chapter 2 Keyword: Single-user operating system

Provides access to the operating system for one user at a time. The operating system can support more than one user account but only one account can be used at once.

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