X/open portability guide - X/Open Company (Englewood Cliffs, N.J. : Prentice-Hall, 1989)
Contents: v.1. X SI commands and utilities. V.2. X SI system interface and readers. v.3. X SI supplementary definitions. v.4. programming languages. v.5. Data management. v.6. Window management. v.7. Net working services.
Keywords: Software compatibility; UNIX (Computer operating system)