DjVU is a file format similar to Adobe's PDF format and there are now many online websites hosting magazines, books etc which require a stand alone player or a Web Browser plugin to allow their viewing.

Software to view Djvu is available as a DotPup file to add to Puppy: Forum announcement of DjVu dotpup∞

Its main advantages over PDF are:

• especially designed for scanned works (documents/images) to be transmitted over the internet
• a much lower memory/RAM requirement when displaying or moving around in documents
• potentially smaller file sizes due to using different compression methods for text and images in the same document

Its main disadvantages re PDF:

• a much lower adoption rate
• less software choice for reading/creating DjVu files∞, fewer features in the software
• less content available

However a lot of scientific texts are available in Djvu format (do a search in eDonkey/aMule), as well as artwork.

• http://djvu.org/∞ Many resources, including links and samples
• http://en.wikipedia.org/wiki/DjVu∞
• DjVuLibre∞ - open source DjVu software
• Any2djvu∞ - Make a Djvu file online
• Lizardtech∞ - Djvu plugins for web browsers