Adobe Acrobat 9 Pro top features:

• Create PDFs from a variety of sources including Word, Excel, and PowerPoint documents, as well as scanned images.
• Editing tools that allow you to modify PDF content. You can add text, images, links, and more to existing PDFs.
• Convert PDFs to other formats such as Word or Excel documents, HTML pages, or even other PDF versions.
• Add security features to your PDFs such as password protection, digital signatures, and encryption.
• Collaborate on PDF documents in real-time with features such as commenting, reviewing, and markup tools.
• Create interactive PDF forms, which can be filled out and submitted electronically.
• Built-in Optical Character Recognition (OCR) technology that allows you to convert scanned documents into editable text.
• Batch processing feature that enables you to apply the same changes to multiple PDFs at once.
• Make PDFs accessible to users with disabilities, such as the ability to add alternative text to images and tags to document elements.
• Plug-ins and scripts to extend its functionality and automate common tasks.