Or at least safely assume the last bit is short of "Processing Unit" of some kind. It's the "A" that makes all the difference. All together, it's shorthand for "Accelerated Processing Unit" -- but ...

The internals are quite simple: There’s the mainboard with AMD’s accelerated processing unit, a fan, a heat sink, a power supply, and two M.2 2280 NVMe SSD slots for storage. AMD’s Strix ...