Remember back in 1980 there was no sysplex. Each machine was a stand-alone system with a single operating system - if we ignore VM guests.
There was a proliferation of 4341s, 4361s(?), 4381s and even a bit later 9370s running MVS. OS/VS1, OS/VS2, VM, DOS (the mainframe one not the PC one), TPF and possibly others. Also remember non-IBM mainframes. Boroughs comes to mind but there were others. Mike Wawiorko -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Bill Johnson Sent: 18 June 2019 05:00 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: mainframe hacking "success stories"? This mail originated from outside our organisation - 00000047540adefe-dmarc-requ...@listserv.ua.edu Multiply that by at least 100 in 1980. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
