The HP-32S was a programmable RPN Scientific Calculator introduced by Hewlett-Packard in 1988 and discontinued in 1991. It continued the tradition of the HP-15C programmable RPN Scientific Calculator. But some functions of the HP-15C were omitted (matrix calculations) and some were reduced in functionality (complex calculations), so to some extent it is more correct to say that the HP-32S expanded upon the HP-34C. It supported complex math, statistics, probability, and other functions. HP-32SII The HP-32SII added algebraic math, fractions and a second shift key. This was introduced in 1991 and discontinued in 2002. Sample program ; This is an HP-32Sii version of the Euclidean algorithm ; to find the greatest common divisor (GCD). ; You run this by putting the two numbers for ; which you want to find the GCD and pressing "XEQ E" E01 LBL E E02 STO A F01 LBL F F02 ÷ F03 FP F04 RCL A F05 x F06 1 F07 x>y? F08 GTO G F09 R(DOWN) F10 PSE F11 x<>A F12 RCL A F13 GTO F G01 LBL G G02 RCL A G03 RTN See also HP calculators List of Hewlett-Packard pocket calculators External links HP's HP-32SII Page The HP Museum's HP-32S Page HP-32S and HP-32S II pictures on MyCalcDB (database about 70's and 80's pocket calculators) HP-32S on Porter Electronics (Website where they are still available) 32s 32S