:About or Circa; an estimated date, e.g., "Abt. 1745"
:[[American Genealogical Biographical Index (AGBI)|American Genealogical Biographical Index]]; A large name index of genealogies published by the [http://www.godfrey.org/ Godfrey Memorial Library]. The data also include unindexed and partially indexed genealogies and several specialized vital record collections and census data from 1790.
:Computer File Index, later known as the [[International Genealogical Index|International Genealogical Index]] (IGI).
:[http://www.dar.org/ Daughters of the American Revolution]; Lineage society for female descendants of soldiers who fought in the Revolutionary War. The [[Daughters of the American Revolution (DAR) Library|DAR Library]] in Washington, D.C. houses significant genealogical collections and is open to the public.
:Date of Birth