운영 체계 일반

  [ F. Brooks https://ko.wikipedia.org/wiki/%ED%94%84%EB%A0%88%EB%8D%94%EB%A6%AD_%EB%B8%8C%EB%A3%A9%EC%8A%A4 ]

 Andrew S. Tanenbaum  Mondern Operating Systems

 The fork call returns a value, which is zero in the child and equal to the child’s PID (Process IDentifier)

in the parent.