Portable Document File (or Format) – these files are extremely useful as anyone who has the free software, Acrobat Reader can view them. We send lo-res pdfs to clients to check work, and hi-res pdfs to printers for them to print from. Visit the Adobe Acrobat website if you need to download the latest version of Acrobat Reader.
What design words or terms have we missed? Tweet them to us @supercooldesign, including the hashtag #knowdesign, and we'll add 'em.