Adobe Reader 9.4.1 / 10.0.0.1 
 

Features
Enhance interaction with PDF Portfolios
PDF Portfolios provide easier navigation when you work with multiple PDF documents and other document types. Portfolios also enable you to work with a collection of materials such as drawings, e-mail messages, spreadsheets, and videos as a single file

, which makes distribution, storage, retrieval, and collaboration easy for end users.