This document provides a detailed description of the use case registration and login process for Desklib, an online library for study material. It includes dialogues and storyboards that explain the steps involved in enrolling for a semester, entering personal details, authenticating the student, selecting major and term, selecting course units and class time, selecting payment options, entering payment details, verifying final result, and generating a receipt. The document also includes a drill-down report of student enrolment for the academic year 2018/2019 semester 1.