TI-81
A 1994 TI-81 showing graphs | |
| Type | Graphing calculator |
|---|---|
| Manufacturer | Texas Instruments |
| Introduced | 1990 |
| Discontinued | 1997 |
| Successor | TI-82 |
| Calculator | |
| Entry mode | D.A.L. |
| Precision | 13 digits |
| Display size | 96×64 pixels, 16×8 characters |
| CPU | |
| Processor | Zilog Z80 |
| Frequency | 5 MHz or 6 MHz |
| Programming | |
| Programming language(s) | TI-BASIC, Assembly |
| User memory | 2400 bytes of RAM |
| Other | |
| Power supply | 4 AAAs, 1 CR1616 or CR1620 |
| Weight | 168 grams (5.9 oz) |
| Dimensions | 173 mm × 79 mm × 22 mm (6.8 in × 3.1 in × 0.85 in) |
The TI-81 was the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and pre-calculus courses. Since its release, it has been superseded by a series of newer calculators; most of these are functionally similar to the TI-81, with the exception of the TI-Nspire series.