Previous versions of Adobe Reader were notorious for slow launch times. Adobe Reader 9 focused heavily on "instantiating"—essentially, getting the software open and ready much faster than its predecessors.
Adobe Reader 9 introduced features that, at the time, greatly enhanced document interaction: adobe 9 reader
This was the "killer feature" of version 9. Adobe integrated Flash technology directly into the PDF reader. This meant that PDFs could contain Flash videos and animations. It allowed businesses to create interactive brochures and presentations that played directly inside a PDF file. Previous versions of Adobe Reader were notorious for