tif The .tif filename extension is the second filename extension that refers to the TIFF format (the other being .tiff) or fully, Tagged Image File Format. TIFF is a professional graphics file format developed by the Aldus Company in 1986 which later merged with Adobe Systems. The TIFF file format is from the Raster graphics family of graphics formats, widely used in the desktop publishing and digital camera industries. The format was popularized as a replacement format to the many proprietary formats used by different manufacturers of scanners. Through revisions and maintenance by Adobe Systems the format garnered a following, adapting to the growing and changing needs of the graphics industry.
pdf The .pdf file format extension was developed by Adobe systems in 1993 as a means of presenting documents in a consistent manner across different platforms, hardware, operating systems, and applications. The format was not released as an open source document format until 2008, though minimal proprietary technologies still controlled by Adobe Systems exist in the format. Every .pdf document carries with it the necessary meta information required to properly reconstruct the text, fonts, and graphics used to produce the document. This ensures that documents will be viewed in exactly the same way the author intended regardless of the device used to open the document. From conception to date, Adobe Systems has continued to support the format adding features with every iteration of the standard including hardened algorithms for document encryption and privacy. Today, many freely available readers exist allowing you to open and view .pdf documents and create or convert other file formats such as .jpeg and .doc into .pdf documents.