olemus
ISO/IEC 2382:
dokument, mis kirjeldab funktsionaalüksust kasutamist ning võib teatada kasutaja, omaniku ja tarnija õigusi ja kohustusi
= document that describes how to use a functional unit, and that may include description of the rights and responsibilities of the user, the owner, and the supplier of the unit

ISO/IEC/IEEE 24765:
dokument, mis esitab teavet soovitud eesmärkide saavutamist taotlevaks süsteemi või komponendi kasutamiseks
= document that presents the information necessary to employ a system or component to obtain desired results

ülevaateid
https://en.wikipedia.org/wiki/User_guide
https://www.manualise.com/en/user-documentation-best-choice/
https://www.userfocus.co.uk/articles/usermanuals.html
https://online-learning.com/five-tips-writing-user-manual/
https://document360.com/blog/creating-a-user-manual/
https://publuu.com/knowledge-base/user-manual-guide/
https://www.dozuki.com/blog/how-to-write-a-user-manual