Who has a sinclair scientific programmable?

[Josef]

I don't think anyone needs historical calculators anymore, but the history is wonderful and it's all about collecting. For example, the history of Sinclair is amazig, who today can invent and write firmware for a device in a few days?

The ROM storage in the calculator held only 320 instructions, just enough for basic arithmetic. How could they possibly squeeze any scientific functions into this chip?

Fortunately Clive Sinclair, head of Sinclair Radionics, had a secret weapon - programming whiz and math PhD Nigel Searle. In a few days in Texas, they came up with new algorithms and wrote the code for the world's first single-chip scientific calculator, somehow programming sine, cosine, tangent, arcsine, arccos, arctan, log, and exponentiation into the chip. The engineers at Texas Instruments were amazed.