Accessibility

The PREL website has been designed to be highly accessible to persons visiting
our site through the use of assistive technologies. Visitors who need to make use
of these features may include:

• People with visual impairments who use text-to-speech converters (programs
  which convert webpages directly to text)
• People with hearing impairments who may need phonetic equivalents for
  audio materials
• People with impaired mobility who have difficulty using a conventional
  mouse or keyboard.
  

The following provides information for visitors to help make the most of these
accessibility features.

Alt Tags
Images are provided with text equivalents which describe the content of the image.
Images without visual content (e.g., an image which supports page layout) are
provided with zero-length text equivalents.

Acrobat Documents
This site contains content in Adobe Acrobat format, also known as “Portable
Document Format” or PDF. There is currently no available direct text-to-speech
converter for Acrobat documents, as Adobe is currently developing this software.
However, this site does provide a link to a text-only version of each Acrobat
document. The accessible link is always adjacent to the link which references
the original PDF document. The text-only version is provided by executing a
service on the Adobe website. This service then retrieves the document from
the PREL website, converts it to HTML and displays the result.

For persons who are not using a speech-to-text converter, the Acrobat reader
may be downloaded from the Adobe website at
www.adobe.com/products/acrobat/alternate.html.

Compliance Statement
Portions of this website were developed under federally funded programs. The
site has been designed to comply with federal standards for website accessibility
as defined in Section 508 of the Rehabilitation Act of 1973.

The pages on this site have been tested for compliance against guidelines adopted
by the World Wide Web Consortium (also known as the W3C). The site complies
with all Priority 1 checkpoints as defined in the Web Content Accessibility Guidelines
1.0 W3C Recommendation 5-May-1999 [www.w3.org/TR/WCAG10/]. Cascading
Style Sheets conform to W3C Specifications for Cascading Style Sheets. The site
is also fully accessible without the application of its style sheets.

The site conforms to requirements for Bobby Approval per the guidelines of the
Center for Applied Special Technology (CAST).

Accessibility Resources
Federal Access Board - Accessibility Guidelines and Standards
[www.access-board.gov/ada-aba/index.htm]
World Wide Web Consortium - Accessibility Initiative
[www.w3.org/wai/]
National Institute on Disability and Rehabilitation Research
[www.ed.gov/about/offices/list/osers/nidrr/index.html]
Information on Alternative Web Browsers
[www.w3.org/WAI/References/Browsing]