- 0–9 .
- Enter a number (`.` in base 10)
- BASE selector
- Convert entry and stack display
- FP / INT
- Floating point or exact arbitrary integers
- Enter
- Push input or duplicate the top
- + − × ÷
- Arithmetic unless used as base digits
- Backspace
- Edit entry
- Delete
- Drop the top value
- Esc
- Clear stack
- Letters
- Digits in bases 16, 58, and 64
- ^
- Power when not a base digit
- _
- Change sign