Help me and newbies

[Herr Straße Laufer]

I know the answer to most of this question, but sometimes get confused with the terminology. This can be a major problem when one unloads an artillery piece only to find it cannot fire indirectly:

Which of the following units can fire indirectly:

Assault guns
Howitzers **
Mortars **
AT guns
Rockets **
Infantry guns ** (depends on the type)
Field guns **
Mountain guns **
Recoilless guns ** (depends on the type)
AA guns

Thank you,

Pat

The funny thing is that I've seen footage of Shermans in plowed positions that allowed their guns to be eleveated over spec, to allow them to "indirect fire". I am certain the the effectiveness of this was not great.
German assault guns were part of the artillery branch but, most did not indirect fire.
And, I've seen footage of what looked like a German 88mm AA gun that was used in the artillery role. But, it might have been a special use?