网站简介：Open source rapid prototyping system that is capable of producing its own parts and can therefore be replicated easily.
网站简介：Contains educational games that improve your math, science, and grammar skills.
网站简介：Current observations, local and global forecast maps, contacts and location. [English, Flemish, French, German]
网站简介：Brief histories and visitor information on over 300 historic buildings and gardens owned by the National Trust in England, Wales and Northern Ireland. Some photographs.
网站简介：Official web site of the Nobel Foundation. Offers a biography of Alfred Nobel, information about the organization, and details of individuals who have received a Nobel Prize.
网站简介：The official website with links to military and other resources supporting all branches of the military in all services.
网站简介：Provides a free online conversion tool to easily convert between different units of measurement in more than 70 categories.
网站简介：Detailed information about Bitcoin blockchain network, blocks, addresses, and transactions.
网站简介：The American Society for Quality (ASQ) is the world s leading authority on quality. With more than 100,000 individual and organizational members, this professional association advances learning, quality improvement, and knowledge exchange to improve business results, and to create better workplaces and communities worldwide.
网站简介：The Bureau of Land Management administers 264 million acres of public lands, located primarily in the 12 Western States, containing natural, historical, cultural, recreational, and economic resources.
网站简介：The publisher for the National Academy of Sciences, the National Academy of Engineering, the Institute of Medicine, and the National Research Council. Thousands of books freely searchable online.
网站简介：ASTM develops technical standards for industry worldwide.
网站简介：International organization within which governments and the private sector coordinate global telecom networks and services.
网站简介：Articles in this journal deal with biological processes at the biochemical or molecular level. Fulltext accessible after 1 year every January
网站简介：Topics covered include arms sales monitoring, biological weapons, cyberstrategy, intelligence reform, military analysis, monitoring emerging diseases, nuclear weapons, secrecy and government, and space policy. Also has links to various Washington-based working groups.
网站简介：Ohio Universities - Bowling Green State University (BGSU), among Ohio's top universities, and one of the best universities in northwest Ohio, is a growing force in national and international research and education
网站简介：News, special reports, blogs, and articles from the San Francisco Chronicle.
网站简介：Free Job Search. Search from over 1 Million Jobs.
网站简介：Offers entry requirements, course summary, and financial information.
网站简介：Basic introduction to a variety of electronics technology applications targeted for the layperson.on.
网站简介：Portal for research and services in bioinformatics, with databases of nucleic acid and protein sequences, and macromolecular structures - from the EMBL, Hinxton UK.
网站简介：Focused on relationships, personality and entrepreneurship testing.
网站简介：Australia's official statistical organisation. Provides a high quality, objective, and responsive national statistical service
网站简介：IDB was established in 1959 to help accelerate economic and social development in Latin America and the Caribbean.
网站简介：The mission of the National Audubon Society is to conserve and restore natural ecosystems, focusing on birds and other wildlife for the benefit of humanity and the earth's biological diversity.