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PDF (Portable Document Format) is a widely-used file format developed by Adobe that captures documents as they are meant to be viewed. It preserves text, images, layouts, and fonts across all platforms and devices. PDF is ideal for sharing official documents, forms, reports, and eBooks. It supports interactivity, including hyperlinks and fillable fields. PDFs can be secured with passwords and digital signatures, making them suitable for confidential or professional use.

PPTX is a presentation file format developed by Microsoft, used by PowerPoint and other compatible software. It is based on the Open XML standard and replaced the older PPT format. PPTX files support multimedia content, animations, transitions, charts, and templates, making them ideal for business, education, and public presentations. The format offers better compression and recovery features than its predecessor and is compatible with many desktop and online presentation tools.