TopDir - top sites directory

TopDir is a human edited web directory with various categories, a collection of hand-picked web resources for visitors

TopDir offers free website promotion for webmasters and website owners. Relevant search results and many categories for adding and promoting websites. Free web promotion for websites at TopDir directory. Submit your url for review. A collection of hand-picked web resources for visitors. This page is focused on one particular aspect of Science, Technology, Directories.

Chemical Engineering@ (10)
Electrical Engineering@ (2)
Environmental Science-Technology@ (69)
Lighting@ (5)

See also:

Science: Chemistry: Directories (16)
Science: Directories (27)
Science: Earth Sciences: Directories (12)

This category in other languages:

Italian (7)

» eFunda: Engineering Fundamentals - Includes list of chemical elements, bearing designs, processes, constants, standard formulas, and general math equations. Other resources are offered by becoming a paid member, such as, such as data sheets and design guides.

» Engineering.com - A web portal with online calculators, tables of mathematical and physical properties, free downloadable programs as well as links to search engines and companies.

» EngineersWebSite.com - A source of software and technical information for process and control engineers.

» Lab Online - Database of laboratory products and services. Page includes articles on recent discoveries within the industry and research centers.

» Links999 - Portal for information about technology, robotics, security issues, and computing web locations worldwide.

» ParalleMIC - An information center on parallel mechanisms (Stewart platforms, and parallel kinematic machines).

» Sitereview.org - Post science and technology website reviews or read and vote on those posted by others.

» Sol-Gel Gateway - A place where chemists physists, materials scientists, and device technologists meet to invent the materials of the next millennium.

» Systems and Control Engineering Resource Center - A resource for systems and control engineers or researchers.

» Techexpo - Listings of hi-technology companies in engineering, medical and life sciences.

» Temperature World - Temperature related news, links and resources. Topics include science, technology, health, sensors, controls, instrumentation, earth and environment.

» Thermal Connection - Provides a resource site for the thermal design engineer. It features free thermal data, calculators, wizards, FAQs, links and TAK 2000 information.

» Tom Duffey's WWW Links - Portal to personal computers, science, technology and electronic engineering resources.

» Top 20 Engineering - Online directory for engineering education in materials, environmental, aerospace, chemical, civil, electrical, software and other scientific links.

TopDir is a human edited web directory with various categories. Our mission is to organize theme based websites and remove the clutter from the information. We strive to provide context based website results to our visitors. This directory is an evolving one and we regularly add new categories, if there is a necessity. Members can suggest new categories and websites for inclusion. This is one stop promotion site for webmasters and website owners. We invite you to browse the categories and suggest your website url for an editor review. This page is focused on one particular aspect of Science, Technology, Directories.

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Web directories list the websites by theme. The links in a web directory are collected, edited and organized by humans. Yahoo and Dmoz ODP(Open Directory Project) are considered as the best human-edited web directories on the Internet and they are one of the most trusted and relied traffic sources. Since these directories get thousands of submissions every day, it is sometimes difficult to get listed in them and your URL may take a long time to be reviewed and listed. Generally good directory listings give a surprise boost to your link popularity.