This document discusses application design and development for database systems. It covers topics like user interfaces, web interfaces to databases, web fundamentals like HTML, HTTP, and URLs. It also discusses technologies used to build web applications like servlets, JSP, and how to provide security. Client-side scripting and applets are covered as ways to make web documents interactive. The document emphasizes that web servers can serve as a front-end to various information services by executing programs that generate HTML documents.