General term for a document that explains how to use or operate something, such as a user manual or instruction booklet.
specification document; specifications; blueprint
Technical document detailing requirements, design, or technical standards for a product or system. Common in engineering and IT.
Please read the manual for the new software.
The development team designed the system based on the specification document.
Compound of 仕様 (しよう, 'specification; way of doing') + 書 (しょ, 'document'). The word 仕様 itself derives from する (to do) + 様 (よう, 'way; manner').