David Crayford asks: >Isn't this all obsolete now? Linux and Windows are used everywhere and I >doubt anybody cares about POSIX certification.
Occasionally I bump into a RFP that includes the letters "POSIX" and/or "UNIX." In principle anybody can put anything they want in a RFP. Scott Ford wrote: >Wasn’t z/OS Unix System Services based on Posix ? It’s seems I heard this >sometime ago. MVS OpenEdition achieved POSIX compliance. z/OS is UNIX® certified. POSIX® refers to IEEE Standard 1003.1, and colloquially it means "UNIX-like," but that's a little dangerous. The reason is that getting the POSIX® label requires a submission and certification, whereas it's possible to be "UNIX-like" without certification. Linux, for example, is assuredly "UNIX-like" even though it's neither POSIX® nor UNIX®. http://get.posixcertified.ieee.org/ There aren't too many products that are POSIX® certified these days, although many more were in the past. Evidently a lot of vendors haven't bothered to renew their certificates. The current POSIX® register is available here: http://get.posixcertified.ieee.org/register.html The Open Group solely handles UNIX® certification and participates in the POSIX standardization process as one of the three "Austin Group" parties. https://www.opengroup.org/membership/forums/platform/unix The current UNIX® register is available here: https://www.opengroup.org/openbrand/register There's a close technical and working relationship between POSIX and the Single UNIX Specification(s), but The Open Group is now the sole grantor of the UNIX® label, based on vendor submissions passing its certification process. Historically, before the certification era, an operating system could have been UNIX basically if AT&T (and maybe the University of California, Berkeley, for a little while) said so. z/OS is at least unusual, probably unique, as a UNIX operating system without some sort of AT&T (Bell Labs) code lineage. - - - - - - - - - - Timothy Sipples I.T. Architect Executive Digital Asset & Other Industry Solutions IBM Z & LinuxONE - - - - - - - - - - E-Mail: sipp...@sg.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
