Final answer:
PDF stands for Portable Document Format and is preferred for academic research due to its ability to preserve document formatting.
Explanation:
PDF stands for Portable Document Format and is a file format used to present and exchange documents reliably, independent of software, hardware, or operating systems.
PDFs are preferred for academic research as they preserve the original formatting of the document, including images, charts, and text, making them ideal for sharing and viewing information consistently.
Adobe introduced PDF in 1992, revolutionizing the distribution and viewing of digital documents globally, becoming a trusted format for individuals, businesses, and government agencies.
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