... users,Table 1. 1 POSIX StandardsSTANDARD DESCRIPTION 10 03 .1 System call and library routines 10 03.2 The shell and UNIX utilities 10 03.3 Test methods and conformance 10 03.4 Real-time interfaces 14 UNIX ... encompassed POSIX .1 and ANSI/ISO C, acollection of 1, 170 APIs were specified in total, and thus the name Spec 11 /70 wasgiven to the group and the specification. The Spec 11 /70 API was delivered ... 82Summary 842 UNIX Filesystems—Evolution, Design, and Implementation 19 69. Development on UNIX starts in AT&T’s Bell Labs. 19 71. 1st Edition UNIX is released. 19 73. 4th Edition UNIX is released....