Site Info - Usability.gov
Overview of web technologies used by Usability.gov.
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Description on Homepage
Provided by the National Cancer Institute. Includes information and resources on making web sites and other user interfaces more useful, usable, and accessible. News and current publications and additional links are provided.
Description from Alexa
Number 129,220 of all websites according to Alexa
Main visitors locations
Percussion offers web content management systems.
Transitional version of HTML.
HTML Transitional 4.01
UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.
JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.
PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.
GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.
External Cascading Style Sheets define style rules in a separate CSS file.
Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.
Gzip (GNU zip) is a file compression algorithm.
A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.
The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit addresses is assigned to it, regardless of the content delivered at that address.
AddThis is a social bookmarking and sharing service owned by Clearspring Technologies.
The Apache HTTP Server is a popular open source web server by the Apache Software Foundation.
The Sun Java System Web Server is a web server developed by Sun, now owned by Oracle.
CrazyEgg is a website visitor and click tracking service.
United States Government
The technology score rates a site based on its technologies in a range from 0 to 100. It consists in a popularity score (how many sites use the same technologies), a traffic score (how much traffic have other sites using the same technologies) and a version score (how many sites use more recent technology versions). Quality alerts also affect the rating.