Scientific calculators that have formula/equation memory

[pier4r]

Thanks for the info! I checked but it cannot be purchased as new (for the checks that I have done, that is: looking on amazon)

Recap:
- Hp35s. ~ 30K of ram
- Casio fx5800P ~ 25K of ram.
- swissmicro DM42 (with a bit more effort to use programs as formulas).
- swissmicro DM15 with registers and program memory (program as formulas) ~1500 bytes program memory.
- Many sharp models have 9 memories and 4 formula memories.


- hp35s : 6.22' x 3.23' in freedom units or in real units: 15.80 cm x 8.2 cm
- Casio fx5800P: 6.4 x 3.2 . 6.22 or 6.4 is still like a big phone.
- DM42: 144mm*77mm
- DM15: 88mm*59mm
- Sharp models: round about 160mm*80mm

Any other suggestion is welcomed.