Common attached file

• Sharable PC or Mac file
• Alternative to a Word file
• Electronic document format
• File that can be e-signed
• PC viewable page format
• Printable file format
• Adobe file-name extension
• Adobe format (abbr.)
• Shareable Adobe file format: Abbr

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
by 1992, initialism (acronym) for portable document format , a generic term.