The design of the UNIX operating system / Maurice J. Bach. Bach, Maurice J. UNIX. UNIX (Computer file). 001.61 19 BAD Includes index. Bibliography: p. 454-457. Englewood Cliffs, N.J. ; New Delhi : Prentice-Hall, c1986. c1986. 1986 Text xiv, 471 p. : eng Prentice-Hall software series