Columbia subject headings:
Harvard subject headings:
Calculators.
Computers.
Lovelace, Ada King, Countess of, 1815-1852--Correspondence.
Mathematicians--Great Britain--Correspondence.
Princeton subject headings:
Ada (Computer program language)
Babbage, Charles, 1791-1871.
Byron, George Gordon Byron, Baron, 1788-1824.
Lovelace, Ada King, Countess of, 1815-1852--Correspondence.