TI PLT SHH1 is a prototype calculator created by Texas Instruments

Texas Instruments

Texas Instruments Inc. , widely known as TI, is an American company based in Dallas, Texas, United States, which develops and commercializes semiconductor and computer technology...

as an early attempt to develop a Linux based calculator. It features an ARM based OMAP 1510 processor, 16 MB RAM, and an SD slot. In conjunction with its TI PLT-FHH1 Personal Learning Tool, Fido Hand Held and TI PLT-SU1 Personal Learning Tool, second generation are prototype calculators. The project was eventually scrapped by TI in early 2004. However, a few of the early prototypes such as the PLT SSH1 leaked to the public, making it one of a few rare prototypes among collectors. A few elements of its design, including its large screen and casing, seem to have been reappropriated for use in the TI-Nspire.

PLT-FHH1 Personal Learning Tool, Fido Hand Held · PLT-WS1 Personal Learning Tool, Wireless Sled (PET project was canceled)