X/Open portability guide /
X/Open Company.
Englewood Cliffs, N.J. : Prentice-Hall,
c1988-1989.
Contents: Vol. 1, XSI commands and utilities - v. 2, XSI system interface and headers - v. 3, XSI supplementary definitions - v. 4, Programming languages - v. 5, Data management - v. 6, Window management - v. 7, Networking services.