[GreenKeys] [External] Re: History of printing machines

[Harold Hallikainen]

On Tue, March 8, 2022 6:27 pm, Bruce Gentry via GreenKeys wrote:
> We had ThermoFax copiers at my high school and the public library.  They
> could also make transparencies for the then popular overhead
> projectors.  The supplies to make a copy were not cheap for high school
> kids, at 15 cents a copy that was the same as almost $2.00 today. A
> transparency was almost $15.00 in today's money.
>
>  Â Â Â  Bruce Gentry, KA2IVY


Speaking of overhead projectors, my high school had an outlet on the
ceiling in one room. Apparently the plans said "Overhead projector
outlet."

Harold
https://w6iwi.org



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