9. Manual
กลุ่มที่1A Manual is a book or pamphlet that contains information about a program or piece of hardware. For example, a computer case may come with documentation explaining what sizes of motherboard it can hold. Or, a video gamemay come with a manual explaininghow to play it
กลุ่มที่2 I think handbook is a small book that gives useful information about a particular subject. Handbook focus of guidance , instruction and various substance .