I guess the one with S-75 and S-125 are SPAA since those were armed with anti-air missile
not sure about the TOS-1, it wasn't used by any artillery units but the Russian NBC Protection Troops does use them
The definition on Wikipedia seems correct.
"A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-lineground combat."
So the T-55 with the anti-air missiles are not tanks
but the TOS-1A, since it was used against infantry and fortified positions, I guess you could call them "tanks"?
would also include assault guns and tank destroyers like the Stug, Brumbar and JadgTiger. And the Stug especially was not a tank and never came under the panzer umbrella.
So is a Bradley IFV. But trust me on this, if you call a Bradley a tank the driver will beat you over the head with a torque wrench.
Having the same role as an MLRS. Which isn't a tank either.
Also, to make the water even muddier
would also include assault guns and tank destroyers like the Stug, Brumbar and JadgTiger. And the Stug especially was not a tank and never came under the panzer umbrella.