When to Reset Calculator

Does the calculator necessarily be reset after every calculation by way of pressing 2nd Reset enter or is it enough to just clr work and or on /off and move on??

Are you using the HP12C? Whether or not you need to reset, and how much, depends on how much of the memory stack & memory cells you want to clear. Pressing on/off won’t do the trick. Check the user manual for details.

I have a TI BA II Plus Professional…