RNOPDF for AmigaOS 4.1, is a joy to use, and makes working with PDFs effortless. Its ribbon-style interface is intuitive, and there’s practically no learning curve if you’re familiar with this kind of software. Really is little more than a viewer, but that’s no bad thing. Controls and navigations are simple and self-explanatory, and the program benefits from being lightning-fast. Search, print and rotate are the most advanced features you’ll find. If you’re looking for a free PDF reader without the bloat, RNOPDF Reader could be the ideal choice. The Portable Document Format (PDF) is a file format developed by Adobe in the 1990s to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.