Editing OSF/1 (section)

== OSF/2 ==

OSF/2, a successor to OSF/1, was described as being based on the TMach system developed by [[Trusted Information Systems]].<ref name="computerworld19900514_mach">{{ cite magazine | url=https://archive.org/details/computerworld2420unse/page/97/mode/1up | title=Move over, Unix: Here comes Mach! | magazine=Computerworld | last1=Anthes | first1=Gary H. | date=14 May 1990 | access-date=15 April 2024 | pages=97–98 }}</ref> TMach, or Trusted Mach, was an operating system architecture incorporating the OSF Mach MK++ kernel, introducing a trusted computing base layer consisting of trusted server components, hosting an application layer in which untrusted programs would run.<ref name="ida199711_p3375">{{ cite tech report | url=https://archive.org/details/DTIC_ADA349992/page/66/mode/2up | title=Assessing DoD Goal Security Architecture (DGSA) Support in Commercially Available Operating Systems and Hardware Platforms | publisher=Institute for Defense Analyses | date=November 1997 | access-date=15 April 2024 | last1=Schneider | first1=Edward A. | last2=Feustel | first2=Edward A. | last3=Ross | first3=Ronald S. | pages=66-67 }}</ref> In 1989, HP announced plans to merge the software platforms of its own products and those of newly acquired Apollo Computer to form a single OSF/2-compliant platform to be delivered by 1992.<ref name="hpprofessional198907_apollo"/>

Other interpretations of the OSF/2 name were associated with various plans to remove AT&T-licensed code from early forms of OSF/1 and the Mach kernel in particular,<ref name="unigramx19900514_osf">{{ cite news | url=https://archive.org/details/UnigramX1990263-313/page/n128/mode/1up | title=OSF Solidifies Plans to Purge AT&T Code | work=Unigram/X | date=14 May 1990 | access-date=25 July 2024 | pages=1 }}</ref> leading to speculation that a system based on the [[Chorus Systèmes SA|Chorus]] microkernel might supplant Mach entirely and become OSF/2 itself.<ref name="unigramx19910903_osf">{{ cite news | url=https://archive.org/details/UnigramX1990263-313/page/n230/mode/1up | title=Micro-Kernel, Real-Time Chorus is "Future of Unix" AT&T and Open Software Foundation Talks in Progress | work=Unigram/X | date=3 September 1990 | access-date=25 July 2024 | pages=1 }}</ref> With such a Chorus-based architecture having been rejected in favour of the Mach 3.0 microkernel, the OSF/2 designation persisted in reporting of this particular form of OSF/1.<ref name="unigramx19910527_osf">{{ cite news | url=https://archive.org/details/UnigramX1991314-365/page/n131/mode/1up | title=AT&T code-free Mach 3.0 is now shipping to computer vendors | work=Unigram/X | last1=O'Gara | first1=Maureen | date=27 May 1991 | access-date=25 July 2024 | pages=2 }}</ref>