Calculator Instructions

The DC-80 calculator is designed for fast arithmatic, featuring a persistant operand.

The top value is the "Result". Underneath that is the "Operand".

You can exchange them with the "Swap" button. (Useful for 1/x type situations) It's keyboard shortcut is "S".

Notice there is no "equals sign". The operator you choose will evaluate immediately.

Since the Operand is still there, you can "undo" an operation by pressing the opposite operator.

You can round any floating point number with the "Round" button. This only effects the Result, not the Operand. Keyboard shortcut = "R".

Copy the Result to your clipboard with the "C" key.

Paste a number into the Operand with the "V" key. It will attempt to filter out any non-numeric characters.

The "back arrow" button deletes the rightmost character, like a backspace key. The keyboard shortcut is "B".

The "AC" button (All Clear) clears both fields, while the "C" button only clears the Operand field. The keyboard shortcuts are "A" and "Z", respectively (sorry, C = copy).

The Power & Root functions have keyboard shorcuts "P" & "O".

The Multiply operation has two keyboard shortcuts: the "asterisk" or "quote/apostrophe" keys. This makes keyboard input possible on keyboard that may or may not have a numeric 10-key pad. (Divide = "/" key)

Likewise, the "plus" and "minus" keyboard shortcuts the -/+ keys to the right of the row of numbers (no Shift required).

The state of your CapsLock key should not matter for any shortcuts.

For those with 10-key number pads, Backspace and Enter have been assigned to "delete right character" and "clear operand", respectively. That helps with the most common operations.