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I found this program that may be helpful for exams on PLSS proportioning. Hope you find it helpful!
This Content Originally Published by a land surveyor to Land Surveyors United Network
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Thanks for being helpful with HP calculators with students and even PLS surveyors or others.
Although the HP 33s is not being made anymore ,there are those who use them.There are some still being sold at different places who buy and sell calculators.Most places are asking 300 dollars or more for them.
Most 33s programs can be made or will already work on a HP35s ,so most HP33s programs can be used on the HP35s, the big problem is the polar to rectangular or rectangular to polar keys are missing on the HP 35s so different program line have to replace them ,so this changes the whole program. Since this program does not use them it appears that it can be used in either calculator. The HP 35 can also use complex numbers for this conversion. The HP 35s is now the most powerful RPN calculator sold today and my hope is HP will continue to make a RPN calculator that can be used for the EXAM and in the field for surveyors. Today only the HP33s and HP35s can be used no other HP. So this is important
for those who use or want to use a RPN calculator. HP 35s 60.00 dollars
PS. a working example on how the program works would also help.
HP for Life,