Difficult-to-change computer file

• Suffix for many a sharable computer file
• Downloaded crossword, often
• Adobe filename extension
• Adobe doc suffix
• Adobe file type: Abbr
• Common print file format
• Sharable PC file
• Resume file extension, often
• E-book format, often

Wikipedia Word definitions in Wikipedia
PDF is the Portable Document Format in computing. PDF or PdF may also refer to: