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Site Info - Nih.gov

Overview of web technologies used by Nih.gov.

Website Background

National Institutes of Health (NIH) | Turning Discovery Into Health
Official website of the National Institutes of Health (NIH). NIH is one of the world's foremost medical research centers. An agency of the U.S. Department of Health and Human Services, the NIH is the Federal focal point for health and medical research. The NIH website offers health information for the public, scientists, researchers, medical professionals, patients, educators, and students. The Site has extensive information on funding and training opportunities, clinical trials, health news and links to the many Institutes and Centers that make-up the NIH.

Description on Homepage

Number 173 of all websites according to Alexa

Popularity rank

Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

Drupal 7
(5% of sites use a newer version)

PHP is a popular scripting language for creating web pages.

PHP

ColdFusion is a scripting language used for building web applications, and developed by Adobe Systems.

ColdFusion

Microsoft's Active Server Pages technology on the .NET framework.

ASP.NET
(used until recently)

JavaScript is a lightweight, object-oriented, cross-platform scripting language, mainly used within web pages.

JavaScript

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

jQuery 1.8.3
(70% of sites use a newer version)

HTML5 is the fifth revision of the HTML standard.

HTML5

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

UTF-8

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.

PNG

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

JPEG

External Cascading Style Sheets define style rules in a separate CSS file.

External CSS

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Embedded CSS

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Inline CSS

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression

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.

Strong ETag

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 address is assigned to it, regardless of the content delivered at that address.

IPv6

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

HTTP Strict Transport Security

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

Default subdomain www

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Default protocol https

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Open Graph

Twitter Cards enable automatic attachment of photos, videos and media elements to Tweets.

Twitter Cards

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

Generic RDFa

GoDaddy is an IT service provider, among others operating as SSL certificate authority. This includes ValiCert certificates, now operated by GoDaddy.

GoDaddy

AddThis is a social bookmarking and sharing service owned by Clearspring Technologies.

AddThis

Google Hosted Libraries (formerly called Google Libraries API) is a content distribution network for the most popular, open-source JavaScript libraries, provided by Google.

Google Hosted Libraries

CrazyEgg is a website visitor and click tracking service.

CrazyEgg

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Nginx

Amazon is a US-based e-commerce and cloud computing provider.

Amazon
hosting info based on data from ipinfo.io, see details

United States Government

.gov

United States

English

Technology Score

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.

TotalPopularity TrafficVersion
Technology Score58615563
Content Management Systems57225495
Server-side Programming Languages749157
Client-side Programming Languages7510051
JavaScript Libraries58984730
Markup Languages678153
SSL Certificate Authorities432463
Social Widgets454049
JavaScript Content Delivery Networks668349
Traffic Analysis Tools381066
Web Servers575956

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