The document describes mockups for the screens of an iPhone application for finding the definitions of acronyms. Screen 1 is a splash screen with branding and loading indicators. Screen 2 is the search screen where users can search or browse acronyms. Screen 3 displays the definition and details of a selected acronym. Screen 4 allows users to submit new acronyms. Additional screens provide options to browse acronyms by category, view top searched items, and receive help instructions.