also: ビーティーオー
noun
build to order; BTO
Business and manufacturing term for products assembled or configured after an order is placed, especially in the PC industry.
このパソコンはBTOで注文したので、メモリを増やせた。
I ordered this PC as build-to-order, so I could increase the memory.
BTO方式なら、必要な部品だけを選べる。
With the BTO method, you can choose only the parts you need.