PDFs

The global standard for fixed-layout digital documents that preserve exact visual formatting across any device, operating system, or screen.

Born from Adobe's Camelot Project in 1991 and standardized as ISO 32000 in 2008, the Portable Document Format (PDF) solves the critical problem of cross-platform document consistency. Unlike reflowable text formats, a PDF encapsulates text, fonts, vector graphics, and raster images into a single file that renders identically whether opened on a smartphone, a legacy PC, or a high-end commercial press. Modern specifications (including PDF 2.0) support advanced features like interactive form fields, 256-bit AES encryption, digital signatures, and accessibility tags. This combination of visual fidelity and security makes it the absolute default for legal contracts, official manuals, and archival records worldwide.

https://www.adobe.com/devnet/pdf/pdf_reference_archive.html