PNG+(portable+network+graphics+bitmap)

=PNG= Short for // ** P **ortable ** N **etwork ** G **raphics, // and pronounced // ping, // a new bit-mapped graphics format similar to GIF. In fact, PNG was approved as a standard by the World Wide Web consortium to replace GIF because GIF uses a patented data compression algorithm. In contrast, PNG is completely patent- and license-free. //(from Webopedia.com)//