# Portable Network Graphics

> family of lossless compression bitmap image file formats

**Wikidata**: [Q178051](https://www.wikidata.org/wiki/Q178051)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PNG)  
**Source**: https://4ort.xyz/entity/png


## References

1. [Source](http://libpng.org/pub/png/pnghist.html)
2. [History of the Portable Network Graphics (PNG) Format. 2009](http://libpng.org/pub/png/pnghist.html)
3. [Source](https://www.w3.org/TR/2003/REC-PNG-20031110/)
4. [Source](https://www.w3.org/TR/png-3/)
5. [Source](http://www.libpng.org/pub/mng/spec/#introduction)
6. Freebase Data Dumps. 2013
7. [Source](http://libpng.org/pub/png/png.html)
8. [Source](https://developer.apple.com/library/content/documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html)
9. Gary Kessler's File Signature Table
10. [png · GitHub Topics · GitHub](https://github.com/topics/png)