| Country of Origin | United States |
|---|---|
| Non-Domestic Product | No |
| Power Source | AC |
| Size | Handheld |
| Custom Bundle | No |
| MPN | SR-56 |
| Bundle Listing | Yes |
| Modified Item | No |
| Vintage | Yes |
| Brand | Texas Instruments |
| Key Size | Regular |
| Type | Programmable |
| Model | SR-56 |
Check the listing for details. Texas Instruments SR-56 Programmable Calculator with Case and Related Manuals. Condition: Used, Made in United States. Listed at 55.00 USD. A handheld electronic calculator, it has a black plastic case with an array of forty small rectangular plastic keys. This second function is indicated on the keyboard above the key. Behind the keyboard is a switch that may be set at R (radians) or D (degrees).