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Glossary of terms


Action button

   A 'button' in a dialogue box on which the user can click in order to cause some event to occur.

ADFS

   Advanced Disc Filing System - the standard RISC OS disc-based filing system.

Adjust button

   The right-hand mouse button.

Adjust size icon

   An icon at the bottom right corner of a window, which the user can drag to adjust the size of the window.

Adjuster arrow

   An icon used in a dialogue box to increase or decrease an associated value, often shown in an adjacent writable field.

Application

   A set of programs and accompanying resources having a specific purpose, and represented by a single icon.

Application directory

   A directory holding the programs and resources that form an application.

Applications Suite

   A set of applications supplied with every RISC OS-based computer.

ARM

   The name of the processor used to run RISC OS. It is now developed by Advanced RISC Machines Limited.

Back icon

   An icon at the top left corner of a window, which the user can click to send the window to the back of the desktop.

Caret

   A vertical red cursor shaped like a capital 'I'. See Cursor.

Character

   Any printable number, letter, or symbol.

CLI

   The 'Command Line Interpreter', which gives users control of the computer using a traditional command line.

Close icon

   One of the small icons in the title bar of some windows. Click in it to close the window.

Cursor

   An indication of the current position in the text. It appears as a vertical bar. Any characters that are typed will appear at the cursor position.

Default

   The condition of a feature as set by the computer or by the software at the beginning of a new session.

Default action

   The action taken if a user presses the Return key when a dialogue box is displayed.

Desktop

   The GUI supplied as a part of RISC OS.

Dialogue box

   A window containing various buttons, switches and editable fields which allows you to control various facets of a program or the desktop.

Directory display

   A window showing the contents of a directory.

Double-click

   The action of clicking the mouse button twice in succession over a particular icon or part of a window. Double-clicks are often used to initiate some kind of action, such as starting an application.

Drag

   The process of moving icons, windows, or the text cursor when selecting text. Whilst dragging, a mouse button is held down as the mouse is moved.

Draw files

   Line art objects compatible with the display mechanism of Acorn Draw.

Emulator

Hardware or software that permits programs written for one computer to be run on another. Usually with a different operating system.

Error box

   A special type of dialogue box that gives information to the user, and requires acknowledgement that it's been read.

Filer

   The part of RISC OS that provides facilities for the user to control filing systems from within the desktop.

Filetype

   A value associated with every file, that specifies the type of data that it contains.

Full icon

   A small icon to the right of the title bar of some windows. Clicking the full box will force the window to become as large as possible, up to the size of the screen. If it is already full, clicking the full box will return the window to the position it occupied before the full box was last clicked.

Gaining the caret

   The time when a window first has the input focus, and hence contains the caret.

GUI

   A 'Graphical User Interface' such as the RISC OS desktop.

Hard disc

   A sealed unit containing a rigid disc spinning very fast, which can store a large amount of information, and retrieve it at very high speeds.

Hourglass

   A sprite displayed to show that an application running under the desktop has temporarily taken over the computer to the exclusion of other applications.

Icon

   A small graphic object (usually a sprite) used symbolically by the desktop. Amongst the things an icon might typically represent are: an option or action within a dialogue box, a file, an application, or a physical device.

Icon bar

   The bar at the bottom of the screen used by the desktop to hold icons. These usually represent applications or physical devices.

Icon bar menu

   A menu produced as a result of the user clicking Menu over an icon on the icon bar.

Input focus

   What the window containing the caret is said to have, shown by changing the border colour of the window

Leafname

   The last part of a pathname.

Menu

   A list of options any of which can be chosen using the mouse. Almost all menus follow the Acorn conventions so that using the Adjust mouse button on a menu retains the menu on-screen. This allows alternative options to be tried easily.

Menu button

   The centre mouse button. Use it when you want to display a menu.

Menu item

   One available option or choice on a menu.

Mouse pointer

   The small icon that moves when the mouse is moved. Its shape can change depending on what is below it on screen.

Multi-scan monitor

   A monitor that can change its scan rate in order to display much higher resolution images than is possible with ordinary monitors.

Multi-tasking

   The ability to run multiple tasks or applications at the same time. RISC OS is a multi-tasking operating system.

Obey file

   A file of commands for execution by RISC OS.

Option button

   A 'button' representing a switch, that can either be on or off.

Palette

   A file or data that maps between the colours that are to be displayed on the screen and the much larger number of potential colours.

Pane

   A dialogue box that is attached to a particular window.

Pathname

   The name of a file including all the directories it is under from the root, or $ directory. For example:
   adfs::HardDisc4.$.!CogProgs.!Anagram1.Sprites

Pelmanism

Pelmanism is a very simple game, and as it's name implies, is a splendid exercise for the memory. Its seams that the Pelmanism Institute for the Scientific Development of Mind and Memory was in no way responsible for the game - only the name.

Persistent dbox

   A dialogue box that appears when the user chooses a menu item followed by an ellipsis. It remains on screen when the parent menu has been closed, and may suspend its parent application until it is filled in.

Pointer

      An icon on the desktop the movement of which is linked to    the mouse.

Pop-up menu

   A menu within a dialogue box that normally just shows the currently selected option, but that the user can make 'pop up' to choose an alternative option.

Printer driver

   A RISC OS application used to print documents: several are supplied as part of the Applications Suite.

Radio button

   One of a group of 'buttons', only one of which may be selected at once.

RISC

   Reduced Instruction Set Computer: a design philosophy used in the ARM which implements only the most frequently used processor instructions, and concentrates on making them execute at great speed.

RISC OS

   Acorn's operating system and GUI, supplied in ROM on all its current range of computers.

Screen mode

   A number or description string which defines the appearance of the display: its resolution, and the number of available colours.

Scroll arrow

   An icon on the right-hand side of a window and/or the bottom, used to scroll the contents of the window by a small amount.

Scroll bar

   An area on the right-hand side of a window and/or the bottom, used to scroll the contents of the window, by approximately the height/width of the window.

Scrollable list

   A window within a dialogue box that shows a set of available options, and has icons with which the user can scroll through the options before choosing one.

SCSIFS

   SCSI Filing System - a RISC OS filing system that uses a SCSI (Small Computer Systems Interface) expansion card to communicate with external peripherals.

Select button

   The left hand mouse button.

Sensorimotor

Of, relating to, or functioning in both sensory and motor aspects of body activity.

Slider

   A bar on the right-hand side of a window and/or the bottom, used to scroll the contents of the window.

Sprite

   A graphic object that is pixel-based (ie one that is defined as a bit-map).

Sprite pool

   An area of memory used and maintained by RISC OS for storing sprites.

Submenu

   A menu reached from another menu (its parent).

Task manager

   A RISC OS feature which lets you adjust the amount of memory allocated to various functions, such as the fonts or the relocatable modules. See your RISC OS user guide for more details.

Title bar

   The area at the top of a window which contains the window title. Holding down the mouse button on the title bar allows the window to be dragged around the screen, and even off screen.

Toggle

   Like an on-off switch - press the key once and the function is on, then press it again and it is off.

Toggle size icon

   An icon at the top right corner of a window, which the user can click to toggle the size of the window between a 'standard' size and a 'maximum' size.

Toolbox

   Window or pane of tool icons from which a user may select a tool to use in an application. A toolbox may be free-standing or attached to another window.

Transient dbox

   A dialogue box that appears as a submenu, and functions in the same way, disappearing when the parent menu is closed.

WIMP

   The part of RISC OS that manages windows within the desktop, incidentally providing much of its functionality.

Window

   A rectangular area of the desktop devoted to a particular function, such as a dialogue box, directory display, editor window or error box.

Window Manager

   The formal name for the Wimp.

Writable field

   A field in a dialogue box or displayed from a menu item within which the user can type text.


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