This scientific calculator by Aristo is a beauty. It has a very solid case with a removable transparent lid. Take the lid off and this beauty of a calculator is revealed. The lid can conveniently be snapped on the back of the calculator. Small bumps on the lid should protect it from scratching. A first look at it might give the impression that this is a simple plain calculator with only basic functionality but of course it isn’t. Very similar to the Aristo M 75 but with an added key for exponents ( EE, at the expense of the M− function). When a result is displayed with an exponent only 5 digits remain for the number part. To display the extra 3 digits not shown the AW function can be used. The calculator uses a non standard way to show the 6 and the 9 with only 5 segments instead of the usual 6. A single dot at the left of the display is used to indicate a non-zero value in the calculator’s memory. There is no battery compartment visible at the back of this beauty. Instead there is a little notch at the bottom to enable lifting the calculator out of its back cover. There you can insert or replace the two AA batteries. Contrary to what one would expect, both batteries face the same way. Everything of this calculator seems to be designed with aesthetics in mind. There is also storage for one spare AA battery. A brief manual of the calculator’s functions is printed on the back. Functions: 22 Keys: 20 Precision: 8 Logic: Algebraic Display type: VFD Length: 151mm Width: 76mm Thickness 18mm The calculator will be packed carefully.