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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.
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2/10 = 0.8, often notated as a percentage, 80%. For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes:
File size is a measure of how much data a computer file contains or how much storage space it is allocated. Typically, file size is expressed in units based on byte . A large value is often expressed with a metric prefix (as in megabyte and gigabyte ) or a binary prefix (as in mebibyte and gibibyte ).
500 kB MFM Model 2 3 1 ⁄ 2 inch Single 1 40 2 1,280 100 kB [28] FM Tandy Portable Disk Drive (aka Brother FB-100, knitking FD-19) 3 1 ⁄ 2 inch Single 1 80 2 1,280 200 kB [29] FM Used only in Tandy Portable Disk Drive 2 5 1 ⁄ 4 inch Double 1 35 18 256 157 kB [30] MFM Color Computer HP 9114A 3 1 ⁄ 2 inch Double 2 80 16 256 128-710kB [31 ...
File:Pensions (Increase) Act 1974 (UKPGA 1974-9 qp).pdf. Add languages. Page contents not supported in other languages. File; Talk; ... Upload file; Special pages;