Category Archives: Uncategorized

Casio fx-991ES PLUS and R

By | March 29, 2014

Today nobody needs a pocket calculator anymore.  You can do calculations with your cell phone, your laptop, or your desktop pc. These modern devices are much faster and more flexible than any old style pocket calculator. Using a pocket calculator is like listening to vinyl records instead of CD's or MP3's. But that makes the… Read More »

C64 vs. iPad

By | March 22, 2014

In 1986 a friend of mine told me he saw a Commodore C64 in a computer store, and it was so expensive. Only the keyboard would already cost about 800 dollars. For today's people:  He told me he was in an Apple store, saw an iPad, and it was s so expensive. Only the screen… Read More »


By | March 16, 2014

Don't try this: Better let it the computer do for you: