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Abbreviation for Portable Document Format
In short and in plain language
PDF is a common file type for documents.
Layout and fonts look the same on many devices.
Businesses use it for invoices or price lists. Data sheets and job ads are often made this way too.
On a phone such a file is often harder to read than a normal web page.
Definition
PDF is a widely used file format for documents that displays layout and fonts the same way on different devices. Businesses use it, for example, for invoices, price lists, data sheets or job ads. On a smartphone a PDF is often harder to read than a normal web page.