This document is intended for
Developers: in order to be sure they are developing the right project that fulfills requirements provided in this document.
Testers: in order to have an exact list of the features and functions that have to respond according to requirements and provided diagrams.
Users: in order to get familiar with the idea of the project and suggest other features that would make it even more functional.
Documentation writers: to know what features and in what way they have to explain. What security technologies are required, how the system will response in each user’s action etc.
Advanced end users, end users/desktop and system administrators: in order to know exactly what they have to expect from the system, right inputs and outputs and response in error situations.