Casio FX-991ES Plus Scientific Calculator. The casio desk calculator comes in handy for all your multiple purposes and it's various features makes it easy to use. Casio adds fun and convenience to daily life. The brand is known for setting new trends. Sep 19, 2018 - The following 2 pages uses this file: User:OgreBot/Uploads by new users/2018 September 19 12:00 User:Tokfo/Clocks/2018 September 11-.
Non VPAM calculators are outdated. Many of the users of the forums never used one!
One could say RPN calculators are outdated too, yet they have a massive following. For me, there is just something 'right' about post-fix function operators as used on the older non-VPAM units. VPAM may be great for students who enter formula directly from a text book, but the real world works a bit differently!
I guess, that the fx-3900PV may be better. This is a programmable calculator with 300 program steps, which can be edited (instead of 30 non-editeable in the fx-61F). Not a chance when it doesn't have base conversion! The 3600PV would be better in that respect.