[hinkley]

> "AppData" is where user specific application data is supposed to be stored.

> "ProgramData" is where application specific data is supposed to be stored.

Simple maybe. Coherent, no.

[lysp]

It was confusing for me too.

Basically:

- AppData = User (interactive) application storage - ProgramData = Service / Background (non-interactive) application storage

[voidfunc]

It's not really any worse than *Nix mess of /bin, /usr, /usr/bin, /usr/local/bin and /opt ... and probably a couple others I missed.