Negative sign
Appears to the left of the number displayed.

ANYLITE solar power
Operates in low light; never needs batteries.

Plastic keys
Tamper-proof, and cannot be removed.

Large keys
Grouped and color-coded by related functions.

Division as "Repeated Subtraction"
The last number and operation entered are automatically stored. Each time the "=" key is pressed, the last number and operation are repeated.

Correcting entry errors
Pressing the "ON/C" key once deletes the last value entered if the "=" key has not been pressed.