With more than 750,000 human-edited definitions, Acronym Finder is the world's largest and most comprehensive dictionary of acronyms, abbreviations, and initialisms.
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This database provides indexing and abstracts from more than 4,000 current serial and non-serial titles, including content from AIAA and NASA.
The landmark American National Biography offers portraits of more than 17,400 men and women -- from all eras and walks of life -- whose lives have shaped the nation.
Archive Finder brings together ArchivesUSA and the cumulative index to the National Inventory of Documentary Sources in the UK and Ireland (NIDS UK/Ireland).
Online access to nearly a million descriptions of archival collections owned by thousands of libraries, museums, historical societies and archives worldwide.
Started in August 1991, arXiv.org (formerly xxx.lanl.gov) is a highly-automated electronic archive and distribution server for research articles in the areas of physics, mathematics, computer science, nonlinear sciences, quantitative biology and statistics.
JapanKnowledge is a powerful reference tool for Japanese language and culture provided by NetAdvance Inc. of the Shogakkan Group Holdings, the top 4th publisher in Japan.
JournalTOCs is the biggest searchable collection of scholarly journal Tables of Contents (TOCs).