Assistive Technologies: partial list of the files, terms, and utilities used

Assistive Technologies: partial list of the files, terms, and utilities used



The following is a partial list of the files, terms, and utilities used:  


• Sticky/repeat keys 
  StickyKeys
  Allows users to lock modifier keys such as ctrl and shift. This enables them to complete keyboard tasks with just   one finger that would normally require two or more fingers.



• Slow/bounce/toggle keys 
  SlowKeys 
  Configures the keyboard such that the user must hold a key down for a specified period of time      before the keystroke   is actually sent. This helps the user avoid sending accidental keystrokes.


   BounceKeys and DelayKeys 
   Inserts a slight delay between keystrokes to prevent the keyboard from sending unintentional              keystrokes.

   ToggleKeys 
    Sounds an audible alert if either the caps lockkey or the num lock key is on


• Mouse keys  
  Enables key sequences to be used to move the mouse cursor on the screen and to send mouse      clicks.


• High-contrast/large-print  desktop themes 
  The last visibility accessibility option we’re going to look at here involves high-contrast, large-text    desktop  themes. In the Universal Access panel, enable the High Contrast and Large Text options  under Seeing.


• Screen reader 
  One option available to visually impaired users is a screen reader, which “reads” the text displayed on the screen    audibly for the user. Some screen readers can use your computer’s sound interface, whereas others require special   speech synthesizer hardware. The Orca application is probably the most commonly used   screen reader.


• Braille display 
  Visually impaired Linux users can also use Braille hardware devices. Several types of Braille displays and       embossers are supported. To interface with these types of devices, the Linux system must be running the brltty   daemon.


• Screen magnifier 
  A screen magnifier allows visually impaired users to magnify areas of the screen as if they were using a real       magnifying glass. You can choose from a wide variety of screen magnifiers, including Orca, GNOME Magnifier, and KDE   Magnifier. Of these, Orca is probably the most popular, primarily because it can function   as both a screen reader   and a screen magnifier.


• Onscreen keyboard 
  For physically impaired users who aren’t able to use a traditional keyboard, Linux provides the option of using an    onscreen keyboard, which allows users to use any pointing device (such as a mouse) to select keys on a virtual     keyboard.


• Gestures (used at login; for example, gdm) 
  GDM supports "Accessible Login" to allow users to log in to their desktop session even if they cannot easily use     the screen, mouse, or keyboard in the usual way. This feature allows the user to launch assistive technologies at     login time by means of special "gestures" from the standard keyboard and from a keyboard, pointing device, or     switch device attached to the USB or PS/2 mouse port. It also allows the user to change the visual appearance of     the login UI before logging in, for instance to use a higher-contrast color scheme for better visibility. GDM only    supports accessibility with the Standard Greeter, so the "Greeter" parameter in gdm.conf must be set to the     Standard Greeter "gdmlogin".


• Orca 
  Orca is a free and open source, flexible, extensible screen reader from the GNOME project for individuals who are     blind or visually impaired.


• OK 
  Onscreen keyboard
  Commonly used onscreen keyboard applications include GOK (GNOME Onscreen Keyboard) and GTkeyboard



• emacspeak 
  emacspeak :Screen reader, text-based terminal screens





LX0-104 Exam Objectives (J)