Computing term for a digital drawing board or drafting board; also used in the phrase 'back to the drawing board' (振り出しに戻る).
We are refining the design of the new app on the drawing board.
The proposal was rejected, so we have to go back to the drawing board.
Variant with interpunct; less common but still seen.
Loanword from English 'drawing board', borrowed as a computing term.