Starting with the W series, this product line supports dual-line displays with multiple line playback, constant calculation, chain calculation, similar to the Casio fx-MS series, TI-34 II Explorer Plus.
The upper line shows entered expression (up to 12 characters at a time).
EL-520W adds 52 physical constants, 44 unit conversions, complex number calculation, 2-3 variable linear equation solver, quadratic equation/cubic function equation solver, Newton generic equation solver, numeric derivative/integral functions, formula memory (max 4 formulae, 256 characters total), algebraic substitution (simulation calculation) to EL-509/531W, for total of 419 functions.
Removed functions include engineering unit display mode, cubic root/power, hyperbolic trigonometry, random dice, random coin, random integer, angle unit conversion, polar/cartesian coordinate conversion, multi-line playback, binary/pental/octal/hexadecimal calculations, 2-variable statistics, 2-key roll-over.
It only supports 8-digit mantissa display in scientific notation mode.
However, it gains cubic power/root, hyperbolic trigonometry, angle unit conversion, polar/cartesian coordinate conversion, complex number calculation, Bin/Oct/Hex calculations (without logical operations) over EL-500W.
Statistics, Date Calculation, Database, Sign Change, Right Shift.