What are PDF (or .pdf) documents, and how can I read them?
Portable Document Format (PDFs) are a way to provide educators with a wide variety of NASA educational documents. PDFs (file extensions are written .pdf) are created using Adobe Acrobat software. The files can contain any combination of text, special fonts, graphics, and color. This capability allows the Resource Directory to provide NASA documents in their original form-with all line drawings, photos, graphs, and mathematical symbols intact. You can view a PDF document by downloading the Adobe Acrobat software from any Resource Directory page on which the Adobe icon is visible. A NASA Educator Focus article, “Understanding Adobe Acrobat PDF Files,” provides more background information and can help you learn how to handle PDF files like an expert.
