PDF, Adobe Acrobat, Foxit Reader, PDF.js, SumatraPDF, Nitro PDF, Document management, Portable Document Format, ISO 32000, Ghostscript, LaTeX, Open PDF, PDF/A, PDF/X, markup languages, electronic documents, digital signatures, document workflow, OCR (Optic

PDF (Portable Document Format) is a widely used file format for sharing fixed-layout documents. Adobe Acrobat and Foxit Reader are software tools for viewing and editing PDFs, while PDF.js is an open-source PDF viewer built with JavaScript. SumatraPDF and Nitro PDF are alternative PDF readers or editors. PDF standards like PDF/A, PDF/X, and ISO 32000 ensure compatibility and archival quality. Document management involves organizing and controlling electronic documents. Formats can include digital signatures for security and OCR to convert scanned images into editable text. LaTeX is a system for creating complex documents. Ghostscript processes PDFs, and markup languages structure content within PDFs.