[email protected] (Mike Schwab) writes: > Android Phones and Pads are derived from Linux, biggest seller in both > categories. Apple iPhones and iPads are derived from Darwin (BSD), 2nd > biggest seller in both categories.
re: http://www.garlic.com/~lynn/2017d.html#40 What are mainframes triva: Darwin derived originally from NextSTEP, original derived from (CMU's) Mach https://en.wikipedia.org/wiki/Darwin_(operating_system) in the 80s, IBM's (new academic) ACIS was pouring money into universities ... it funded a lot of corporate sponsored BITNET (which was larger than arpanet/internet for a time) http://www.garlic.com/~lynn/subnetwork.html#bitnet based on IBM's internal network technology, vm370 vnet/rscs (which was larger than arpanet/internet from just about the beginning until sometime mid-80s) http://www.garlic.com/~lynn/subnetwork.html#internalnet it also jointly funded MIT's project Athena with DEC ($25M each, DEC and IBM both had assistant directors at project Athena, the IBM assistant director was a former co-worker from the IBM cambridge science center). IBM also funded $50M Andrew project at CMU, Andrew File System, Mach unix work-alike operating system, camelot (ibm then funded spin-off as TRANSARC and then bought TRANSARC outright), IBM rep was former co-worker at IBM San Jose Research. Mach https://en.wikipedia.org/wiki/Mach_(kernel) Mach is a kernel developed at Carnegie Mellon University to support operating system research, primarily distributed and parallel computing. Mach is often mentioned as one of the earliest examples of a microkernel. However, not all versions of Mach are microkernels. Mach's derivatives are the basis of the modern operating system kernels in GNU Hurd and Apple's operating systems macOS, iOS, tvOS and watchOS. The project at Carnegie Mellon ran from 1985 to 1994, ending with Mach 3.0, which is a true microkernel. Mach was developed as a replacement for the kernel in the BSD version of Unix, so no new operating system would have to be designed around it. Experimental research on Mach appears to have ended, although Mach and its derivatives exist within a number of commercial operating systems. These include NeXTSTEP and OpenStep, upon which macOS is based -- all using the XNU operating system kernel which incorporates an earlier, non-microkernel, Mach as a major component. The Mach virtual memory management system was also adopted in 4.4BSD by the BSD developers at CSRG,[2] and appears in modern BSD-derived Unix systems, such as FreeBSD. ... snip ... Transarc https://en.wikipedia.org/wiki/Transarc Andrew File System https://en.wikipedia.org/wiki/Andrew_File_System Not originally funded by IBM, but there was also UCLA's Locus unix work-alike. However IBM PASC then worked closely with UCLA and Locus was used for IBM's AIX/370 and AIX/386 https://en.wikipedia.org/wiki/LOCUS_(operating_system) even more trivia, Mach wiki references EROS https://en.wikipedia.org/wiki/LOCUS_(operating_system) The EROS project started in 1991 as a clean-room reconstruction of an earlier system, KeyKOS. KeyKOS was an operating system developed by Key Logic, Inc., and was a direct continuation of work on the earlier GNOSIS (Great New Operating System In the Sky) system created by Tymshare, Inc. The KeyKOS system offered a degree of security and reliability that remains unduplicated today (2006).[citation needed] The circumstances surrounding Key Logic's unfortunate demise in 1991 made licensing KeyKOS impractical. Since KeyKOS did not run on popular commodity processors in any case, the decision was made to reconstruct it from the publicly available documentation. ... snip ... capability-based operating systems derived from the IBM 370 GNOSIS operating system developed by Tymshare. when M/D bought Tymshare, I was brought in to evaluate GNOSIS as part of the spin-off as KeyKOS. Key Logic did some optimization and partly because of the higher-level abstraction, they were able to redevelop (IBM) ACP/TPF applications and show them running faster on KeyKOS than on ACP/TPF (on the same hardware). -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
