Any computer with Adobe Acrobat Reader (or similar product) can open a PDF file. To easily merge, rotate or edit PDF online, check out this free PDF editor.
These files can be password protected, encrypted, edited, and 3D artwork has been supported since 2004. Most PDF readers are royalty free for ease of access and use. It allows the user to utilize various images, fonts, and text formats (sometimes search-able and containing hyperlinks) in a single document that is print-ready and easy to share from any device. PDF files present a document in a fixed layout (much like an image) which translates the same throughout various programs, hardware, and operating systems.
PDF stands for Portable Document Format and was developed by Adobe.
