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2. Smallpdf.com - Wikipedia

   en.wikipedia.org/wiki/Smallpdf.com

   Smallpdf is a Swiss online web-based PDF software, founded in 2013. [2] It offers free version with limited features to compress, convert and edit PDF documents. [3] And its paid version offers advanced features like OCR, compress, and more [4].

3. List of archive formats - Wikipedia

   en.wikipedia.org/wiki/List_of_archive_formats

   An open source, patent- and royalty-free compression format. The compression algorithm is a Burrows–Wheeler transform followed by a move-to-front transform and finally Huffman coding. .F, .?XF [e] Freeze/melt [3] QNX4, Unix-like and DOS: Old compressor for QNX4 OS. The compression algorithm is a modified LZSS, with an adaptive Huffman coding ...

4. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

5. Group 4 compression - Wikipedia

   en.wikipedia.org/wiki/Group_4_compression

   Group 4 compression is available in many proprietary image file formats as well as standardized formats such as TIFF, CALS, CIT (Intergraph Raster Type 24) and the PDF document format. G4 offers a small improvement over G3-2D by removing the end-of-line (EOL) codes.

6. Data compression ratio - Wikipedia

   en.wikipedia.org/wiki/Data_compression_ratio

   Lossless compression of digitized data such as video, digitized film, and audio preserves all the information, but it does not generally achieve compression ratio much better than 2:1 because of the intrinsic entropy of the data. Compression algorithms which provide higher ratios either incur very large overheads or work only for specific data ...

7. Vitamin D not recommended for preventing fractures in older ...

   www.aol.com/vitamin-d-not-recommended-preventing...

   The U.S. Preventive Services Task Force released a draft recommendation advising against using vitamin D to prevent falls and fractures in people over 60. Pharmacist Katy Dubinsky weighs in.