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Casio FX-7000G is a calculator which is widely known as being the world's first graphing calculator available to the public. It was introduced to the public and later manufactured between 1985 and 1987. The calculator offers approximately 82 functions and is capable of manual computation for basic arithmetic problems. The most notable feature is its ability to graph functions, both those programmed into the calculator as well as new graphs written by the user.
The calculator can compute basic arithmetic functions with a precision up to 13 digits. Many functions integrated into the calculator include arithmetic and algebraic computations such as:
Like many Casio calculators, the FX-7000G includes a programming mode, in addition to its display and graphing mode. It holds approximately 422 bytes of programming memory, less than half a kilobyte. However the calculator does allow for expanded/additional memory by a method of reducing the number of steps within a program. This is done by optimizing the amount of steps a program has to fill a single unit of memory ,instead of several.. The user may save any program they create or are in the process of creating in a programming slots; A feature also used in the Casio BASIC handheld computer.
The calculator uses a tokenized programming language which is well suited when writing complexer programs, as memory efficiency is a priority. Tokenization is performed by using characters and symbols in place of long lines of code to minimize the amount of memory being used. The User Manual programming catalog is written in these symbols, allowing for lengthier programs to be written with less effort and less memory. One example is a program which estimates an indefinite integral through the use of Simpson's Rule; this can be found within the user manual for reference.
The calculator has a built in graphing feature which is unique to its model. The calculator can display either built-in graphs that are already programmed or display a user made graph. . The user also has the option to rewrite any of the previously programmed graphs.
Display and Exterior
The FX-7000G incorporates an LCD Dot Matrix design via the display window. When set into character mode the calculator can display up to sixteen characters on one of its eight display lines . This sixteen character by eight line display is screened on the 95x63 dot matrix .
A black casing surrounds the calculator along with a metal panel implemented on the rear; a large plastic screen protects the LCD display window as well. Keys are labeled and printed on orange, green, blue, red, and black mailable buttons.
The calculator's dimensions (width, height, depth) are 83.5mm x 167mm x 14mm. It has an approximate mass of 155.5g including batteries. 
The Casio Fx-7000G uses a 9.0 volt DC current lithium battery. The calculator does not accept an adapter and only uses batteries. The average battery life is around 120 hours which is shorter in length compared to similar models.