Casio FX-991MS Calculator with Circular Front Control

This calculator is shown with a dark rectangular body, upper display and key rows. The front carries the pictured Casio name.

The front display, rows of keys and surrounding frame provide a reference for the desk-accessory layout. Its photographed colour can coordinate with other stationery items.

Compare the selected model identifier with the calculation functions you require. The image identifies the exterior controls; supported functions, power source and included accessories require the corresponding specification rather than assumptions from an illustrated screen.