Casio fx-7000G
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| Introduced | October 1985 |
|---|---|
| Discontinued | 1988 |
| Calculator | |
| Entry mode | Infix |
| Precision | 13 digits |
| Display type | LCD Dot matrix |
| Display size | 96 × 64 pixels/8 * 16 characters |
| Programming | |
| Memory register | 26 numbers 78 numbers (maximum) |
| Program steps | 422 bytes |
| Other | |
| Power supply | 3 × CR2032 Lithium |
| Dimensions | 165 mm × 89 mm × 15 mm (6.5 in × 3.5 in × 0.6 in) |
The 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 c. 1988. Notable features are its ability to graph functions, and that it is programmable. The calculator offers 82 scientific functions and is capable of manual computation for basic arithmetic problems.
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:
Other specialized functions also implemented into the calculator include hyperbolic and statistical functions, binary/octal/hexadecimal/sexagesimal conversions and graph plotting.
Like many Casio calculators, the FX-7000G includes a programming mode, in addition to its display and graphing mode. It holds 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 one of ten 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 more complex 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.
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