Focus on the pronunciation of PDF
English definition of “PDF”
/ˌpiːdiːˈef/ noun IT
› [U] abbreviation for portable document format: a system for making computer documents that can be used with any computer system and sent from one computer to another. The documents can be looked at or printed, but not changed: I'll send you the document in PDF format. The industry journal is delivered monthly in Adobe PDF and has a subscriber base of approximately 600. PDF document/file You can save and print PDF files for reading later.
› [C] a document made using a PDF system: The sheet-fed scanner excels at making PDFs from documents.