The TI-55 was an early programmable scientific calculator released by Texas Instruments in 1977.
| Introduced | 1977 |
|---|---|
| Programming | |
| Programming language(s) | Keystroke |
| Interfaces | |
| Ports | DC power connector (on BP7 battery pack) |
| Other | |
| Power supply | 9V (stepped up from 2.4V supplied by internal battery pack or external power supply) |
| Dimensions | 145(l) x 80(w) x 45(h)mm |