A "scratch pad" is a type of writing surface, typically a small notepad or notebook, that is used for jotting down quick notes, ideas, reminders, or calculations. It serves as a temporary and informal tool for capturing information or working through thoughts before transferring them to a more permanent location. The term "scratch" implies the casual nature of the content, allowing for rough sketches, doodles, or rough drafts. With its simplicity and convenience, a scratch pad provides a practical means for capturing thoughts on paper quickly and easily.