If not, this is a perfect calculator that with the solar power feature, will last you a lifetime.

If not, this is a perfect calculator that with the solar power feature, will last you a lifetime.  Read Less

I am very happy with my newly-purchased el-506 sharp scientific calculator.

I am very happy with my newly-purchased el-506 sharp scientific calculator.  Read Less

You can spend 30 minutes with the manual, and then throw it away.

You can spend 30 minutes with the manual, and then throw it away.  Read Less

I wish numbers would appear in the top line with the rest of the formula as you enter them.

I wish numbers would appear in the top line with the rest of the formula as you enter them.  Read Less

This things does everything you should expect from a scientific calculator and is at good value price.

This things does everything you should expect from a scientific calculator and is at good value price.  Read Less

This new thing is 4 times beter and for the price you can't match.

This new thing is 4 times beter and for the price you can't match.  Read Less

I paid less than $15 for mine on amazon and with the shipping it was a real value.

I paid less than $15 for mine on amazon and with the shipping it was a real value.  Read Less

It's not just another keystroke, it's also that pressing shift makes you reach all the way to the top of the screen.

It's not just another keystroke, it's also that pressing shift makes you reach all the way to the top of the screen.  Read Less

Press sto + x (right next to sto) and it stores it in the x-value.

Press sto + x (right next to sto) and it stores it in the x-value.  Read Less

The ti 30x iis has a first-function inverse key, x^-1; superb!

The ti 30x iis has a first-function inverse key, x^-1; superb!  Read Less

The buttons are soft (not like a higher priced hp).

The buttons are soft (not like a higher priced hp).  Read Less