This document discusses tablet application development. It covers the major platforms for tablet development - iOS, Android, and WebOS. For iOS development, Xcode is used on Mac computers, and apps are built with Objective-C and the Cocoa Touch framework. Android apps can be developed on Windows, Mac or Linux computers using Eclipse and the Java programming language. WebOS apps can be built on any operating system using JavaScript. The document provides an overview of Xcode and its tools for iOS development and demonstrates some basic Objective-C syntax. It also discusses considerations for tablet app design such as simplicity, sticking to the platform conventions, pricing models, and marketing.