/ping/ (PNG) An extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-colour, greyscale and truecolour images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits.
PNG is designed for on-line viewing applications, such as the World Wide Web, so it is fully streamable with a progressive display option. PNG is robust, providing both full file integrity checking and simple detection of common transmission errors. Also, PNG can store gamma correction and chromaticity data for improved colour matching on heterogeneous platforms.
Filename extension: .png.
RFC 2083. W3C PNG pages (http://w3.org/Graphics/PNG/). PNG home page (http://wco.com/~png/).
- Portable object adapter
architecture (POA) Part of the CORBA architecture. [Details?] (2004-06-23)
- Portable operating system interface
operating system, standard (POSIX) A set of IEEE standards designed to provide application portability between Unix variants. IEEE 1003.1 defines a Unix-like operating system interface, IEEE 1003.2 defines the shell and utilities and IEEE 1003.4 defines real-time extensions. [“More UNIX For Dummies”, ISBN: 1-56884-361-5] says it stands for “Portable Operating System Interface with an X […]
- Portable pixmap
file format (PPM) A colour image file format. A PPM file contains the following: a two character “magic number” – “P3”, the width in pixels, the height in pixels, the maximum colour component value, HEIGHT rows of WIDTH pixels. The rows are ordered from top to bottom with the pixels in each row ordered from […]
- Portable scheme debugger
(PSD) A package for source code debugging of R4RS-compliant Scheme under GNU Emacs by Kellom ?ki Pertti email@example.com. Version 1.1. Distributed under GNU GPL. It works with scm, Elk and Scheme->C. (ftp://ftp.cs.tut.fi/pub/src/languages/schemes/psd.tar.Z). (1992-10-08)