Excellence in photos, a fictitious start-up company, is interested in building a photo sharing application that allows users to upload and share photos with each other. This application also includes a social aspect and allows people to post comments about photos. User must be able to upload, view, and edit photos quickly and securely. Additionally, they would like this application to easily scale as the number of users and photos increases. In order for these goals to be achieved, the system must also have an efficient pipeline for photo processing capabilities, such as re-sizing, cropping, and thumbnail generation. You can sort your photos by their file folders or create virtual albums. After importing your photos into database, you can sort them into Events, connected photos either shot on the same day o stored in the same folder, all displayed in a timeline. You can tag and sort by people or location through Geo- tagging options. It also includes tools for making everything from panoramas and calendars. Design activity and data diagram for the above system using Structured Analysis and Design Technique (SADT) design process