IBM® Rational® Host Access Transformation Services (HATS) transforms traditional text-based interfaces—such as 3270 and 5250 green-screen applications—into web, portlet, rich client or mobile device user interfaces. It also extends 3270, 5250 and virtual terminal (VT) applications as standard web services. With Rational HATS, you can easily convert traditional text-based host application screens to user-friendly GUIs. Rational HATS is available in the following packages: Rational HATS for Multiplatforms and HATS for Linux® on zSeries®, Rational HATS for 5250 Applications on Multiplatforms, and Rational HATS for 5250 Applications on i5/OS®. Rational HATS allows you to reuse and repurpose your existing assets in innovative ways. Terminal applications—transform the user interface of your 3270 and 5250 green-screen applications. Web services—extends 3270, 5250 and VT application core business logic as web services or JavaBeans. Customization—provides customizable workflow and application navigation. Toolkit—provides wizard-based, visual development including visual page design and macro editing. Deployments—route applications to IBM WebSphere® Application Server and IBM WebSphere Portal Server, as well as a number of devices and clients.