AM Calculator Basic

The AM Calculator Basic is a pocket calculator manufactured by AM Studios as a "zeroth" iteration of the AM Calculator product line. It was released after the AM Calculator Pro.
The model is based on two-line four-function calculators. Compared to the original AM Calculator, it is smaller and thinner, due to the limited feature set and the lack of second-layer labels.
==Design==
The AM Calculator Basic features an e-ink screen (with a blue filter for the M register line) and color-matched casing with a grid of 24 keys.
Unlike previous models, the arrow keys are on the left.
The AM Calculator Basic also uses an obelus division sign, representing PEMDAS-priority division. Previous models, including the original AM Calculator, used a fraction slash. After apologizing profusely, AM Studios cited screen size. The company stated that if the calculator tried to disambiguate operations on expression entry, the adjustments might not fit on the screen, leaving the user unaware of the change.
==Registers==
The AM Calculator Basic is the first in the line to present stored values as registers instead of variables. Still, unlike in many competing products, these are displayed at all times.
The A register is equivalent to the ans variable on prior AM Calculator models, representing the last calculated answer to an expression. The "A=" text is highlighted if the user has not started typing a new expression since it was calculated. This indicates that the value still matches the expression shown onscreen. Otherwise, the cursor returns to the expression line. The A register is cleared if the user presses the C key twice in a row, first clearing the expression line.
The M register is standard for a basic calculator. It holds a number in memory, which the user can insert into a new expression. By chording the M key with the keys with cyan edges, the user can clear the M register, set it to, or increase or decrease it by the value of the A register.
==Easter eggs==
The AM Calculator Basic has a secret gyroscope. If the calculator is held upside down, all of the printed digits are swapped out for their inverted equivalents. Various small easter eggs occur if a register spells a word. They are all undone by reorienting the calculator, as it may happen unintentionally.
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