Comment by aerostable_slug

For those who might be wondering, facilities/counties/states vary a huge amount on what is and isn't allowed.

In California they teach inmates coding, while in other states all computer-related technical books are banned as security risks. Same with basic electrical work — Promising People has an interesting VR program for teaching electrical helper skills, but in some correctional systems that would be considered unacceptably risky. Tablet and similar system operators/vendors have to shape the material available to the inmates to suit the local restrictions.