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Was the HP-15C the last scientific calculator to support classic RPN? My definition of classic RPN is the programming model used in calculators like the HP-25C and HP-34C. Simple keystroke programming without things like formula entry and named variables.

Hi, John --

Quote:
Was the HP-15C the last scientific calculator to support classic RPN? My definition of classic RPN is the programming model used in calculators like the HP-25C and HP-34C. Simple keystroke programming without things like formula entry and named variables.

Well, I'd question that definition, because those features are supplements and enhancements to RPN, not modifications of it.

However, if those features are grounds for disqualification, several other models released in 1982 or later lacked them:

  • 1982: HP-10C (basic scientific)
  • 1982: HP-16C (for computer science)
  • 1983: HP-41CX (HP-41C/CV were released in 1979/1980)
  • 1988: HP-32S ("lettered" storage registers, but not alphanumeric variables or equations)

-- KS

Edited: 21 Mar 2007, 12:16 a.m.