Here is what Wikipedia saya: 86-DOS (which imitated CP/M) was purchased by Microsoft and developed further as MS-DOS and PC DOS . Microsoft first licensed,[6] then purchased[7] 86-DOS from Seattle Computer Products (SCP), which was modified for the IBM PC by Microsoft employee Bob O'Rear with assistance from SCP (later Microsoft) employee Tim Paterson .[8] O'Rear got 86-DOS to run on the prototype PC in February 1981. 86-DOS had to be converted from 8-inch to 5.25-inch floppy disks and integrated with the BIOS , which Microsoft was helping IBM to write.[9] IBM had more people writing requirements for the computer than Microsoft had writing code. O'Rear often felt overwhelmed by the number of people he had to deal with at the ESD (Entry Systems Division) facility in Boca Raton . 86-DOS was rebranded IBM PC DOS 1.0 for its August 1981 release with the IBM PC. look here: it says here that (like linux) windows started out "inspired" by unix Later, a group of Microsoft programmers (primarily Paul Allen , Mark Zbikowski and Aaron Reynolds)[9] began work on PC DOS 2.0. Completely rewritten from the ground up, DOS 2.0 added subdirectories and hard disk support for the new IBM XT , which debuted in March 1983. A new 9-sector format bumped the capacity of floppy disks to 360 kB. The Unix -inspired kernel featured file handles in place of the CP/M-derivative file control blocks and loadable device drivers could now be used for adding hardware beyond what the IBM PC BIOS supported. PC-DOS remained a rebranded version of MS DOS until 1993 when IBM and Microsoft parted ways. sources: http://en.m.wikipedia.org/wiki/PC_DOS http://en.m.wikipedia.org/wiki/86-DOS kinda interesting reading for a rainy day :-)~MIKE~(-: On Thu, Dec 18, 2014 at 12:03 PM, Todd Millecam wrote: > > > http://clusterize.net/wp-content/uploads/2009/08/Unix_history-simple_20021.png > Gives a good visual history of the *nix OSes and what they're derived from. > > > > On Thu, Dec 18, 2014 at 11:57 AM, Michael Havens wrote: >> >> I was before 9yo (assuming 1980) >> >> :-)~MIKE~(-: >> >> On Thu, Dec 18, 2014 at 11:49 AM, koder wrote: >>> >>> DOS was purchased by Gates from another developer who seems to have >>> derived it from CP/M >>> >>> IBM bought DOS from gates before he even owned it, thus establishing a >>> pattern of vaporware that persists even today in the Microsoft marketing >>> system. >>> >>> IBM bought DOS from Gates because the owner of DR-DOS decided he would >>> prefer to be flying his plane than talk to a bunch of establishment white >>> shirts from IBM. >>> >>> Both Gates and Jobs saw the first GUI at Xerox PARC. >>> >>> Jobs saw it first and had the first version on the streets. >>> >>> When Gates put out Win1.0 ther5e ws a very loud pissing contest and >>> court suits, that Microsoft won establishing the standard that you can't >>> copyright the look and feel of an operating system. This gives us X-Windows. >>> >>> The animosity lasted as long as Jobs was alive, alth9ugh they looked >>> like they had grudgingly kissed and made up at their last public appearance. >>> >>> Ancient history long before many of you were born. >>> >>> >>> >>> On 12/18/2014 11:34 AM, Stephen Partington wrote: >>> >>> This is a rather simple answer for a look on story. >>> >>> http://en.m.wikipedia.org/wiki/GNU >>> http://en.m.wikipedia.org/wiki/History_of_Microsoft_Windows >>> On Dec 18, 2014 11:29 AM, "Michael Havens" wrote: >>> >>>> Linux is built off of GNU. What is BSD built off of? And then there is >>>> Windows. I heard that Windows was built off of Unix. If that is the case >>>> was no one paying attention to copyright laws? >>>> :-)~MIKE~(-: >>>> >>>> --------------------------------------------------- >>>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >>>> To subscribe, unsubscribe, or to change your mail settings: >>>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >>>> >>> >>> >>> --------------------------------------------------- >>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >>> To subscribe, unsubscribe, or to change your mail settings:http://lists.phxlinux.org/mailman/listinfo/plug-discuss >>> >>> >>> >>> --------------------------------------------------- >>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >>> To subscribe, unsubscribe, or to change your mail settings: >>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >>> >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.phxlinux.org/mailman/listinfo/plug-discuss >> > > > -- > Todd Millecam > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss >