Which BASIC pocket computers make the best calculators?

[rawi]

StephenG1CMZ wrote;

Quote: I wonder whether one might consider the Raspberyy PI

The Raspberry PI is a fascinating machine but I do not think that it can be addressed as a pocket or handheld computer. I think there are two important differences:
First it is not a system that can be handheld with computer + keyboard + battery + screen in one integrated device. And second there is no well defined software that comes with the system and which is ready to be used as soon as you switch it on.