Editing PowerOpen Environment (section)

==Overview==
The POE contains [[application programming interface|API]] and [[application binary interface|ABI]] specifications.<ref name="ppc">{{cite journal | journal=IEEE | publisher=[[IEEE]] | title=PowerPC Processors | pages=550–556 | first1=Anthony | last1=Marsala | first2=Basel | last2=Kanawati | url=https://www.ece.uprm.edu/~nayda/Courses/Inel4215F03/powerpc.pdf | access-date=August 19, 2022}}</ref> The presence of the ABI specification in the POE distinguishes it from other open systems such as [[POSIX]] and [[XPG4]], since it allows [[platform (computing)|platform]]-independent binary compatibility, which is otherwise typically limited to particular [[computer hardware|hardware]]. Derived from [[AIX operating system|AIX]], the POE conforms to industry open standards including POSIX, XPG4, and [[Motif (software)|Motif]].

The POE is hardware [[computer bus|bus]] independent. System implementations can range from [[laptop computer]]s to [[supercomputer]]s. It requires a multi-[[user (computing)|user]], [[computer multitasking|multitasking]] operating system. It provides [[computer network|networking]] support, an [[X Window System]] extension, a [[Mac (computer)|Macintosh]] Application Services extension, and Motif.

Macintosh Application Services (MAS) was an Apple software product intended to run existing Mac applications alongside other applications in the X environment, including those written for the 680x0 architecture.<ref name="macweek19930322_market">{{ cite magazine | url=https://archive.org/details/MacWEEKVol07Num12/page/n36/mode/1up | title=Apple not the only player in the PowerPC market | magazine=MacWEEK | date=22 March 1993 | access-date=6 May 2024 | last1=Norr | first1=Henry | volume=7 | issue=12 | pages=37 }}</ref> Also supporting Mac applications that had been ported to PowerPC, MAS was described as "Apple's key contribution to the PowerOpen alliance" and was demonstrated running Mac applications including a [[QuickTime]] movie on three different workstation platforms. It was an optional component in the PowerOpen architecture.<ref name="byte199308_poweropen">{{ cite magazine | url=https://archive.org/details/eu_BYTE-1993-08_OCR/page/n61/mode/2up | title=PowerOpen Gives Users Freedom of Choice | magazine=Byte | last1=Halfhill | first1=Tom R. | date=August 1993 | access-date=6 May 2024 | pages=58–59 }}</ref>