More than 40 historical census reports, including decennial reports dating back to 1790, are available for download on this website as PDFs. Historical statistics address topics such as population totals by race, urban or rural status, educational attainment, and means of transportation to work, among others.

There are also histories of the 21 U.S. census questionnaires produced from 1790 to 2000, including instructions to census marshals dating back to 1820. Comparative tables show which censuses included specific questions on subjects, such as ancestry and mental disabilities, and whether respondents were deaf, blind, insane, feeble-minded, paupers, literate, or convicts. Additional information includes state and territorial censuses, mortality schedules produced for a number of 19th-century censuses, population at the time of each census, and supplemental censuses taken at various times on free and slave inhabitants, Indian populations, unemployment, and housing.

Because of the PDF format, the reports take a number of minutes to download. These materials are useful for those needing demographic information or researching the history of census taking and the development of census categories.

Currently provides more than 122 images of objects, documents, and photographs pertaining to the history of the town of Worthington, OH, founded in 1803 by a group of families migrating from western Connecticut and Massachusetts. The site creators plan to add more materials in the future, including digitized versions of 19th- and 20th-century newspapers and oral histories. Users may search by subject, title, or keyword in bibliographic records—which include abstracts of up to 100 words for each item—or browse the collection by decade or 27 categories covering aspects of the social, economic, cultural, civic, and environmental history of the town. Includes links to 22 related sites. Useful for those studying local history.

Presents histories of two secretive U.S. intelligence organizations—the National Reconnaissance Office (NRO) and the National Security Agency (NSA)—and documents the use of satellite imagery in U.S. intelligence operations. Material is organized into three electronic briefing books. The site includes 23 documents from 1961 to 1996 on the creation of the NRO—established in 1961 to coordinate U.S. reconnaissance efforts; 24 documents from 1950 to 2000 on the NSA, created to manage and control U.S. communications intelligence activities; and 14 satellite photographs with a 4,400-word essay on the history of U.S. satellite imagery from 1960 to 1999. The NSA briefing book offers President Truman's 1952 memo establishing the agency and additional documents concerning topics such as North Vietnam military strategy, India's atomic energy program, the global surveillance network known as Echelon, and concerns about possible infringement by the agency of privacy rights of U.S. citizens. Satellite photographs show sites in the Soviet Union, the Sudan, Iraq, Serbia, and Afghanistan.

Includes links to information on three microfiche sets of related documents and three books on the history of U.S. intelligence operations by the site's creator, Jeffrey T. Richelson. Valuable for those studying the effects of technological developments on the history of U.S. espionage activities and international relations during and after the Cold War.

Approximately 75 items that tell the story of pioneering African American flyers, their contributions to the World War II effort, and racial discrimination they suffered. The site is arranged into four sections containing narratives of approximately 350 words each with hyperlinks leading to related images, mostly photographs. The exhibit also includes reproductions of posters, newspaper articles, insignias, advertisements, personal accounts, government documents, and letters. Searchable by keyword, decade, exhibit section, media, or name of plane. The reproduction quality of some of the items is poor; several newspaper articles are so blurred they are virtually unreadable.

Includes two lesson plans for grades 5-12, links to nine related sites, and an 11-title bibliography. The site will provide students with a brief introduction to an often neglected aspect of African American and aviation history.

Provides nearly 12,300 documents pertaining to Nobel Prize-winning geneticist and microbiologist Joshua Lederberg (b. 1925), acclaimed for his work in molecular biology and the genetics of bacteria. Most of the material dates from 1945 to the present. Includes more than 10,300 pieces of correspondence, more than 550 articles, 19 lab notebooks, 228 newspaper columns, 48 speeches, 55 monographs, 28 essays, 32 official reports, 83 photographs, and 9 video clips. An exhibit orients visitors to Lederberg's important work in bacterial and cellular genetics, artificial intelligence and expert systems, exobiology ("the study of life outside the atmosphere"), emerging infectious disease and biological warfare (Lederberg was a critic of biological warfare research), and health and the future. The site is fully searchable. Valuable for those studying the history of science and social policy.

Provides historical information and photographs pertaining to more than 300 surveying instruments used in America to delimit land and transport boundaries "since the first European colonists settled here some 400 years ago and turned the American landscape into property." Visitors may browse by 23 types of instruments—from alidades to zenith telescopes—and by 117 names of instrument makers. Informative texts on makers, types of instruments, and specific instruments run from one sentence to 300 words in length. Entries include bibliographic references. Of value for those studying the history of science and technology.

Presents the full text of the 11th edition of the Encyclopedia Britannica, published in 1911, with approximately 30,000 articles by more than 1,500 authors. According to PageWise, an Internet information resource responsible for digitizing the Encyclopedia, the 11th edition marked a shift to a more journalistic writing style than existed previously. The site will provide a wealth of material for those studying the state of commonly available knowledge at the time of this edition's circulation.

Presents 7,680 scanned pages of 47 notebooks kept by American chemist Linus Pauling (1901-1994) from 1922 to 1994. Pauling won two Nobel Prizes—for Chemistry in 1954 and for Peace in 1962—due to his involvement in campaigns for nuclear disarmament. Each notebook contains a contents index. In addition, the site provides a detailed alphabetical subject index that includes personal names. Notebooks offer many reprints of articles published by Pauling. The site also directs users to 23 selected highlights—pages relevant to Pauling's most significant work and to some autobiographical entries. Includes "An Open Letter to President Bush," dated January 1991, in protest of the Gulf War. Valuable for those studying the history of American science in the 20th century.

This focused site presents page images and some transcriptions of Jefferson's catalogs of books (1783 and 1789), farm book, garden book, draft of the Declaration of Independence, and some architectural documents. Visitors can browse the page images and search (where transcriptions are available) all the works. Summary descriptions are also available for each document or document type. The catalogs are Jefferson's working lists of books in his personal library. The manuscript copy of Jefferson's draft of the Declaration of Independence is not complete. The Farm Book contains Jefferson's records about his farm holdings and activities on his farms, spanning from 1774 to 1824. The Garden Book contains Jefferson's records about his gardens at Monticello and Shadwell spanning from 1766 to 1824. The architectural documents section offers more than 600 architectural drawings, sketches, and notes relating to buildings designed by Jefferson, such as Monticello and the Virginia Capitol, organized into 26 subjects.

Visitors can choose to view documents in the primary window as transcriptions (if available), as a large image, or as a small image. The search feature allows keyword search of available transcriptions. Though limited in scope, this site is useful for those interested in specific Jefferson documents.

An exhibit of 60 images, mostly photographs, and a 2,500-word essay that presents a social history of deaf community life in the U.S. from the early 19th century to the present. Covers education, the development of American Sign Language, the "silent press," deaf people in the workplace, media portrayals, deaf clubs, activism, and technological developments. Also includes material on a few historical figures such as the Reverend Thomas Hopkins Gallaudet and Alexander Graham Bell. Hosted by the National Deaf Life Museum, the website also has links to educational resources and the Through Deaf Eyes documentary film produced by Florentine Films/Hott Productions and WETA, Washington, DC, in association with Gallaudet University. A solid introduction to the history of deaf people in America.