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Portable Network Graphics

File format
Portable Network Graphics is a raster-graphics file format that supports lossless data compression. PNG was developed as an improved, non-patented replacement for Graphics Interchange Format —unofficially, the initials PNG stood for the recursive... Wikipedia
Developed by: PNG Development Group (donated to W3C)
Extended to: APNG, JNG and MNG
Initial release: 1 October 1996; 27 years ago
Magic number: (8 bytes Hexadecimal)
Standard: ISO/IEC 15948, IETF RFC 2083
UTI conformation: public.image