The assignment is u have to describe about use case text, use case diagram, vision document, glossary document and supplementary specification document using famous articles or software projects as described in the ‘use case assignment docs’. U can search any articles available online or any IT company article about the above five things. You can find one article or five different articles. But please make sure u write in your words do not copy paste please at the end please give reference. If you have any doubts let me know immediately