Photographs from the World Transportation Commission, 1894-1896. Visitors may select an image from the database by an exact phrase, a phrase in which results must match all the words, or a phrase in which results can match any of the words. The user may also determine the number of results. Visitors may search by keyword or concept, incorporating Boolean operators.
Users also have the option of placing higher search value on certain words in their queries.
The University of Melborne in Australia established the History of Science, Technology and Medicine WWW Virtual Library Database in 1994. The site provides an Excite search engine that enables visitors to obtain information that matches their keyword or concept-based queries. The database contains numerous science, technology and medicine-related sites organized by region as well as sites featuring biographical data, online exhibits, research tools, bibliographies, and electronic texts. Then look no further than the Marx and Engels Archive. This online database contains the equivalent of 40,000 pages of books and documents by the progenitors of Communism.