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older HP calculators
07-06-2017, 02:43 PM (This post was last modified: 07-06-2017 02:46 PM by SlideRule.)
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RE: older HP calculators
GOOGLE® HP Champion series calculator

18c
19b
19b II (3 variants)

28c
28s

for HP folding models

however, for the sake or full inclusion, other manufacturers also marketed folding {w/ a central spine} calculator(s), both horizontal & vertical.

BEST!
SlideRule
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Messages In This Thread
older HP calculators - Katy Brocksmith - 07-06-2017, 02:31 PM
RE: older HP calculators - SlideRule - 07-06-2017 02:43 PM
RE: older HP calculators - striegel - 07-07-2017, 12:31 AM



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