On 27 Dec 2008 at 21:26, Tony Duell wrote:
  I thought I knew most of the HP calculators, but
I can't think of one
 that's called the 'Programmer'. The nearest would be the HP16C (codename
 'Pr' IIRC) which is the 'Voyager' series machine designed for low-level
 programemrs with boolean operations, shifts/rotates, etc. One currently
 resides on my eelctronics bench. 
 IIRC, the 16C was called the "Computer Scientist"; the TI hex-capable  
You are probably right. I am pretty sure that the internal code name for
the 16C was 'PR' which certainly suggest 'programmer'. The other Voyagers
had numeric code names (10C = 0.5, 11C, 12C = 1.0; 15C = 1.5 IIRC)
  calculator (based loosely on the TI-30) was called the
"Programmer".
 LED display initially, replaced by the LCD Programmer and the
 Programmer II.  None of the TI models holds a candle to the HP16C
 (mine is still chugging along... 
I have never been able to get my head round a calculator with an '='
button (at least not unless said '=' is used only for comparisons). Which
maeans it's very rare for me to use a non-HP handheld calculator.
-tony