[RndTbl] How much did one second of computer time cost in 1975?

Scott Toderash scott at 100percenthelpdesk.com
Tue Oct 26 06:20:40 CDT 2021

I remember in 1987 being told it was nanosecond billing, not per second 
for TSO services with IBM here. But I don't know the rate.

On 2021-10-25 20:56, Brian Lowe wrote:
> Hello all,
> Today with multi-core CPUs running at gigahertz speeds attached to 
> gigabytes
> of RAM and terabytes of disc space, we're well used to running programs 
> that
> require what would be enormous resources back when mainframes ruled the 
> data
> centre.
> My question is "how much did one second of computer time cost in 1975?" 
> This
> assumes the program in question is being run on a mainframe from IBM or 
> any of
> the other manufacturers of the day. Of course, there are a lot of 
> factors to
> consider: leasing costs, staffing, power and cooling, if the system 
> could run
> more than one program simultaneously, and how computer time was charged 
> back
> to the users.
> I'm interested to know if anyone on this list has had experience with 
> this
> sort of system accounting, and if they can recall some numbers.
> Regards,
> Brian
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