Many things

[Vintage Computer Festival]

On Mon, 31 Jan 2005, Tony Duell wrote:

> > Color laser printers output a serial number indicator of some sort
> > by a near-invisible pattern of yellow pixels overlaying the
> > printed image.  I imagine it's not 100% reliable but apparently
> > it's been in place for some time.
>
> If that's true, it's a darn good reason to use classic printers :-)
>
> If I bought a printer and found it was puting stuff on the paper that was
> not specified by the input data, it would go straight back to the shop as
> being defective. Period.

If I remember correctly Xerox has been doing this over over a decade,
perhaps longer.

-- 

Sellam Ismail                                        Vintage Computer Festival
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International Man of Intrigue and Danger                http://www.vintage.org

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