I’m not sure of replacements for the other apps, but Aves Libre is the best gallery app I’ve ever used and it’s open source

I like how they aren’t even actual math problems just vocabulary definitions

I mean I think mine could, but even if it couldn’t I would have no problem with it being the thickness of like a Palm m505 which easily fits a full sized card on a pocket sized device

The form factor is kind of pointless though, I can think of maybe two devices I own where a full sized sd card wouldn’t fit and be more convenient

I’ve only seen that option on phones with two radios, it uses the 2.4GHz radio for one connection and the 5GHz radio for the other

Dos, windows was just a normal dos program you had to start like anything else until windows 95