A

A may refer to:

"A," in Collier's New Encyclopedia, New York: P. F. Collier & Son Co. (1921)
"A," in Encyclopædia Britannica (11th ed., 1911)
"A (entry)," in Easton's Bible Dictionary (1897)
"A," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
"A," in A Dictionary of Music and Musicians, (ed.) by George Grove, London: MacMillan & Co., Ltd. (1900)
"A," by John Weeks Moore in Complete Encyclopaedia of Music, Boston: Oliver Ditson Company (1880)
"A," in The Encyclopedia Americana, New York: The Encyclopedia Americana Corporation (1920)