mini tower
A computer case form factor, smaller than a mid-tower, typically used for compact desktop PCs.
このミニタワーケースは省スペースで組みやすい。
This mini tower case saves space and is easy to build in.
ミニタワー型のパソコンを買った。
I bought a mini tower PC.
Variant with a middle dot, sometimes seen in product names or older documentation.
Borrowed from English 'mini tower', referring to a compact vertical computer case.