Multi-Line Playback lets you recall previous calculations* - very useful for comparing formulas and results and checking for accuracy. You can also modify the equation or substitute new numeric values.
*Up to 142 steps
EL-510R
-
EL-531RH, EL-509RH, EL-531R, EL-509R
-
EL-531RH (BL/GR)
EL-520R
-
EL-506R/EL-546R
-
EL-500L
-
EL-530L