Casio fx-7000G

fx-7000G
Introduced	October 1985
Calculator
Entry mode	Infix
Precision	13 digits
Display Type	LCD Dot matrix
Display Size	96×64 pixels/8 * 16 characters
Programming
Memory Register	78(26) numbers
Program Steps	422 bytes
Other
Power supply	3×"CR-2032" Lithium
Dimensions	6.5" x 3.5" x 0.6"

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The Casio fx-7000G is notable for being the world's first graphing calculator.

It came with 422 bytes of memory and it was possible to store up to ten programs in 10 program slots. 422 bytes is not much by today's standards, but with its heavily tokenised programming language, programs performing fairly complex tasks could be written.

The power-on switch is a small slider half-way up the left-hand side.
The lower keys have the traditional Casio layout. The EXE key would execute the sum on the keyboard. The Ans key could be used to represent the last answer; simple iterative functions could be built up.
The upper keyboard has the main function keys. The SHIFT and ALPHA keys are used to access the many different functions each key could be.
The power-on screen displays system mode, calculation mode, angle unit and rounding. These could be changed by pressing the MODE button, or SHIFT then MODE buttons, as shown on the writing below the screen.