Some sources for computer history:
CALL #       QA76.17 .C36 1996.
AUTHOR       Campbell-Kelly, Martin.
TITLE        Computer : a history of the information machine / Martin Campbell-
               Kelly and William Aspray.
IMPRINT      New York : Basic Books, c1996.

CALL #       QA76.17 .E15 1990.
AUTHOR       Eames, Charles.
TITLE        A computer perspective : background to the computer age / by the 
               office of Charles & Ray Eames ; introduction by I. Bernard 
               Cohen ; epilogue by Brian Randell.
IMPRINT      Cambridge, Mass. : Harvard University Press, 1990.

CALL #       QA76.17 .S49 1984.
AUTHOR       Shurkin, Joel N., 1938-
TITLE        Engines of the mind : a history of the computer / Joel Shurkin.
IMPRINT      New York : Norton, c1984.