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"I'm a fairly visual thinker. In doing science, I think in terms of pictures of things happening, and then do the mathematics."
- Gregory Benford

Genoprinter  
  A device that does a 'live capture' of a biometric skin sample.  

The gravity trains departed from the level just below Center. Lilo bought two tickets, nervously sticking her hand into the slot of the genoprinter before doing so. It had worked well enough on Mars.

... She felt the scrape of the sampler across her palm, the machine whirred, and somewhere in the banks of the Pluto Central Computer an entry was made:

JOVIAN-342 (ID-L-502-KC-98) BOARDED FLORIDA-BARROW SHUTTLE 0349 HRS. 4/8/71.

The security check was automatic, and it came up green.

From The Ophiuchi Hotline, by John Varley.
Published by Quantum Science Fiction in 1977
Additional resources -

Compare to the automated DNA typing from the 1997 film Gattaca and the palm lock from Frank Herbert's 1965 novel Dune.

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Additional resources:
  More Ideas and Technology from The Ophiuchi Hotline
  More Ideas and Technology by John Varley
  Tech news articles related to The Ophiuchi Hotline
  Tech news articles related to works by John Varley

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