<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">This seems to have cost data from 1975 to 1985. Hopefully it is relevant info.</div><div class=""><br class=""></div><div class="">Vijay</div><div class="Yr5TG" data-hveid="CAQQAA" data-ved="2ahUKEwjmuN3g-OjzAhU0Ln0KHWNeAHYQ5wF6BAgEEAA" style="clear: both; display: flex; font-size: 14px; line-height: 1.58; margin-bottom: 18px;"><div class="bHexk Tz5Hvf" style="flex-grow: 1; margin-left: 20px; position: relative; margin-top: 5px;"><a href="https://books.google.ca/books?id=2BaU-56SOfUC&pg=PA10&dq=how+much+did+mainframe+computer+usage+cost+in+1975&hl=en&newbks=1&newbks_redir=1&sa=X&ved=2ahUKEwjmuN3g-OjzAhU0Ln0KHWNeAHYQ6AF6BAgEEAI" data-ved="2ahUKEwjmuN3g-OjzAhU0Ln0KHWNeAHYQ6AF6BAgEEAI" style="color: rgb(75, 17, 168); text-decoration: none; outline: 0px;" class=""><br class=""><h3 class="LC20lb DKV0Md" style="font-weight: normal; margin: 0px 0px 3px; padding: 5px 0px 0px; font-size: 20px; line-height: 1.3; display: inline-block;">Monthly Labor Review - Volume 109, Issue 9 - Page 10</h3><div class="NJjxre TbwUpd" style="display: inline-block; padding-bottom: 2px; padding-top: 1px; position: absolute; left: 0px; top: 0px;"><cite class="iUh30 qLRx3b Zu0yb tjvcx" style="color: rgb(32, 33, 36); font-style: normal;">books.google.ca<span class="dyjrff qzEoUe" style="color: rgb(95, 99, 104);"> › books</span></cite></div></a><div class="B6fmyf" style="position: absolute; top: 0px; height: 0px; visibility: hidden; white-space: nowrap;"><div class="TbwUpd" style="display: inline-block; padding-bottom: 2px; padding-top: 1px;"><cite class="iUh30 qLRx3b Zu0yb tjvcx" style="color: rgb(32, 33, 36); font-style: normal;"><span class="dyjrff qzEoUe" style="color: rgb(95, 99, 104);"></span></cite></div><div class="eFM0qc" style="display: inline-block; padding-bottom: 2px; padding-top: 1px; padding-left: 2px; visibility: visible;"></div></div><div class="N96wpd" style="margin-top: 8px;">1986</div><div class="cmlJmd ETWPw" style="color: rgb(60, 64, 67); line-height: 1.58; margin-top: 10px; border: 1px solid rgb(223, 225, 229); border-top-left-radius: 10px; border-top-right-radius: 10px; border-bottom-right-radius: 10px; border-bottom-left-radius: 10px; padding: 15px;"><div class="VNSPub" style="color: rgb(112, 117, 122); font-weight: bold; margin-bottom: 6px; text-transform: uppercase;">FOUND INSIDE – PAGE 10</div>Domestic <span style="font-weight: bold;" class="">consumption</span> of micro , mini , and <span style="font-weight: bold;" class="">mainframe computers</span> , " 1960–84 [ Dollars in millions ) Table 4. ... declining component <span style="font-weight: bold;" class="">costs</span> , and other technical developments led to the introduction of the personal computer in <span style="font-weight: bold;" class="">1975</span>.</div></div></div>Vijay Sankar<br class=""><div class="">ForeTell Technologies Limited<br class=""><a href="mailto:vsankar@foretell.ca" class="">vsankar@foretell.ca</a>
</div>
<div><br class=""><blockquote type="cite" class=""><div class="">On Oct 26, 2021, at 12:00 PM, <a href="mailto:roundtable-request@muug.ca" class="">roundtable-request@muug.ca</a> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Send Roundtable mailing list submissions to<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span><a href="mailto:roundtable@muug.ca" class="">roundtable@muug.ca</a><br class=""><br class="">To subscribe or unsubscribe via the World Wide Web, visit<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>https://muug.ca/mailman/listinfo/roundtable<br class="">or, via email, send a message with subject or body 'help' to<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>roundtable-request@muug.ca<br class=""><br class="">You can reach the person managing the list at<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>roundtable-owner@muug.ca<br class=""><br class="">When replying, please edit your Subject line so it is more specific<br class="">than "Re: Contents of Roundtable digest..."<br class=""><br class=""><br class="">Today's Topics:<br class=""><br class=""> 1. How much did one second of computer time cost in 1975?<br class=""> (Brian Lowe)<br class=""> 2. Re: How much did one second of computer time cost in 1975?<br class=""> (Adam Thompson)<br class=""> 3. Re: How much did one second of computer time cost in 1975?<br class=""> (Adam Thompson)<br class=""> 4. Re: How much did one second of computer time cost in 1975?<br class=""> (Scott Toderash)<br class=""><br class=""><br class="">----------------------------------------------------------------------<br class=""><br class="">Message: 1<br class="">Date: Mon, 25 Oct 2021 20:56:07 -0500<br class="">From: Brian Lowe <brian2@groupbcl.ca><br class="">To: roundtable@muug.ca<br class="">Subject: [RndTbl] How much did one second of computer time cost in<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>1975?<br class="">Message-ID: <7988573.jIZ38J7S2z@haremya.renyamon.net><br class="">Content-Type: text/plain; charset="us-ascii"<br class=""><br class="">Hello all,<br class=""><br class="">Today with multi-core CPUs running at gigahertz speeds attached to gigabytes <br class="">of RAM and terabytes of disc space, we're well used to running programs that <br class="">require what would be enormous resources back when mainframes ruled the data <br class="">centre.<br class=""><br class="">My question is "how much did one second of computer time cost in 1975?" This <br class="">assumes the program in question is being run on a mainframe from IBM or any of <br class="">the other manufacturers of the day. Of course, there are a lot of factors to <br class="">consider: leasing costs, staffing, power and cooling, if the system could run <br class="">more than one program simultaneously, and how computer time was charged back <br class="">to the users.<br class=""><br class="">I'm interested to know if anyone on this list has had experience with this <br class="">sort of system accounting, and if they can recall some numbers.<br class=""><br class="">Regards,<br class="">Brian<br class=""><br class=""><br class=""><br class=""><br class="">------------------------------<br class=""><br class="">Message: 2<br class="">Date: Tue, 26 Oct 2021 00:17:13 -0500<br class="">From: Adam Thompson <athompso@athompso.net><br class="">To: Continuation of Round Table discussion <roundtable@muug.ca>, Brian<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Lowe <brian2@groupbcl.ca>, roundtable@muug.ca<br class="">Subject: Re: [RndTbl] How much did one second of computer time cost in<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>1975?<br class="">Message-ID: <960940F4-55CD-4317-AD32-A7323D611243@athompso.net><br class="">Content-Type: text/plain; charset="utf-8"<br class=""><br class="">There are many people here who used the UofM mainframe back when it was updated on a chargeback system (including me, sadly, although my Dept paid the bill, not me).<br class="">Of course I didn't keep a copy of the rate sheet, so I don't remember what 1sec cost.<br class="">It wouldn't quite be the fully-loaded cost you describe, but it would be close - I don't think Computer Services was expected to turn a profit back in 1991.<br class="">-Adam<br class=""><br class="">On October 25, 2021 8:56:07 p.m. CDT, Brian Lowe <brian2@groupbcl.ca> wrote:<br class=""><blockquote type="cite" class="">Hello all,<br class=""><br class="">Today with multi-core CPUs running at gigahertz speeds attached to gigabytes <br class="">of RAM and terabytes of disc space, we're well used to running programs that <br class="">require what would be enormous resources back when mainframes ruled the data <br class="">centre.<br class=""><br class="">My question is "how much did one second of computer time cost in 1975?" This <br class="">assumes the program in question is being run on a mainframe from IBM or any of <br class="">the other manufacturers of the day. Of course, there are a lot of factors to <br class="">consider: leasing costs, staffing, power and cooling, if the system could run <br class="">more than one program simultaneously, and how computer time was charged back <br class="">to the users.<br class=""><br class="">I'm interested to know if anyone on this list has had experience with this <br class="">sort of system accounting, and if they can recall some numbers.<br class=""><br class="">Regards,<br class="">Brian<br class=""><br class=""><br class="">_______________________________________________<br class="">Roundtable mailing list<br class="">Roundtable@muug.ca<br class="">https://muug.ca/mailman/listinfo/roundtable<br class=""></blockquote>-------------- next part --------------<br class="">An HTML attachment was scrubbed...<br class="">URL: <http://muug.ca/pipermail/roundtable/attachments/20211026/1069387e/attachment-0001.htm><br class=""><br class="">------------------------------<br class=""><br class="">Message: 3<br class="">Date: Tue, 26 Oct 2021 00:27:59 -0500<br class="">From: Adam Thompson <athompso@athompso.net><br class="">To: Continuation of Round Table discussion <roundtable@muug.ca>, Brian<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Lowe <brian2@groupbcl.ca>, roundtable@muug.ca<br class="">Subject: Re: [RndTbl] How much did one second of computer time cost in<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>1975?<br class="">Message-ID: <F2A7C63D-FC41-4D76-B91A-556C4F84F177@athompso.net><br class="">Content-Type: text/plain; charset="utf-8"<br class=""><br class="">Whoops. Definitely not 1975. I know most systems *were* operated on a chargeback basis then, but I didn't even know computers existed in '75. Maybe email the docents at the Computer History Museum?<br class="">-Adam<br class=""><br class="">On October 26, 2021 12:17:13 a.m. CDT, Adam Thompson <athompso@athompso.net> wrote:<br class=""><blockquote type="cite" class="">There are many people here who used the UofM mainframe back when it was updated on a chargeback system (including me, sadly, although my Dept paid the bill, not me).<br class="">Of course I didn't keep a copy of the rate sheet, so I don't remember what 1sec cost.<br class="">It wouldn't quite be the fully-loaded cost you describe, but it would be close - I don't think Computer Services was expected to turn a profit back in 1991.<br class="">-Adam<br class=""><br class="">On October 25, 2021 8:56:07 p.m. CDT, Brian Lowe <brian2@groupbcl.ca> wrote:<br class=""><blockquote type="cite" class="">Hello all,<br class=""><br class="">Today with multi-core CPUs running at gigahertz speeds attached to gigabytes <br class="">of RAM and terabytes of disc space, we're well used to running programs that <br class="">require what would be enormous resources back when mainframes ruled the data <br class="">centre.<br class=""><br class="">My question is "how much did one second of computer time cost in 1975?" This <br class="">assumes the program in question is being run on a mainframe from IBM or any of <br class="">the other manufacturers of the day. Of course, there are a lot of factors to <br class="">consider: leasing costs, staffing, power and cooling, if the system could run <br class="">more than one program simultaneously, and how computer time was charged back <br class="">to the users.<br class=""><br class="">I'm interested to know if anyone on this list has had experience with this <br class="">sort of system accounting, and if they can recall some numbers.<br class=""><br class="">Regards,<br class="">Brian<br class=""><br class=""><br class="">_______________________________________________<br class="">Roundtable mailing list<br class="">Roundtable@muug.ca<br class="">https://muug.ca/mailman/listinfo/roundtable<br class=""></blockquote></blockquote>-------------- next part --------------<br class="">An HTML attachment was scrubbed...<br class="">URL: <http://muug.ca/pipermail/roundtable/attachments/20211026/10c5c8a3/attachment-0001.htm><br class=""><br class="">------------------------------<br class=""><br class="">Message: 4<br class="">Date: Tue, 26 Oct 2021 06:20:40 -0500<br class="">From: Scott Toderash <scott@100percenthelpdesk.com><br class="">To: Continuation of Round Table discussion <roundtable@muug.ca><br class="">Cc: Brian Lowe <brian2@groupbcl.ca><br class="">Subject: Re: [RndTbl] How much did one second of computer time cost in<br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>1975?<br class="">Message-ID: <47bc090bd0b43936e78fb557ca059046@100percenthelpdesk.com><br class="">Content-Type: text/plain; charset=US-ASCII; format=flowed<br class=""><br class="">I remember in 1987 being told it was nanosecond billing, not per second <br class="">for TSO services with IBM here. But I don't know the rate.<br class=""><br class=""><br class="">On 2021-10-25 20:56, Brian Lowe wrote:<br class=""><blockquote type="cite" class="">Hello all,<br class=""><br class="">Today with multi-core CPUs running at gigahertz speeds attached to <br class="">gigabytes<br class="">of RAM and terabytes of disc space, we're well used to running programs <br class="">that<br class="">require what would be enormous resources back when mainframes ruled the <br class="">data<br class="">centre.<br class=""><br class="">My question is "how much did one second of computer time cost in 1975?" <br class="">This<br class="">assumes the program in question is being run on a mainframe from IBM or <br class="">any of<br class="">the other manufacturers of the day. Of course, there are a lot of <br class="">factors to<br class="">consider: leasing costs, staffing, power and cooling, if the system <br class="">could run<br class="">more than one program simultaneously, and how computer time was charged <br class="">back<br class="">to the users.<br class=""><br class="">I'm interested to know if anyone on this list has had experience with <br class="">this<br class="">sort of system accounting, and if they can recall some numbers.<br class=""><br class="">Regards,<br class="">Brian<br class=""><br class=""><br class="">_______________________________________________<br class="">Roundtable mailing list<br class="">Roundtable@muug.ca<br class="">https://muug.ca/mailman/listinfo/roundtable<br class=""></blockquote><br class=""><br class="">------------------------------<br class=""><br class="">Subject: Digest Footer<br class=""><br class="">_______________________________________________<br class="">Roundtable mailing list<br class="">Roundtable@muug.ca<br class="">https://muug.ca/mailman/listinfo/roundtable<br class=""><br class=""><br class="">------------------------------<br class=""><br class="">End of Roundtable Digest, Vol 202, Issue 11<br class="">*******************************************<br class=""></div></div></blockquote></div><br class=""></body></html>