Internal Program Version: DjVuLibre  3.5.25

DjVu is a web-centric format and software platform for distributing
documents and images. DjVu can advantageously replace PDF, PS, TIFF,
JPEG, and GIF for distributing scanned documents, digital documents,
or high-resolution pictures. DjVu content downloads faster, displays
and renders faster, looks nicer on a screen, and consume less client
resources than competing formats. DjVu images display instantly and
can be smoothly zoomed and panned with no lengthy re-rendering. DjVu
is used by hundreds of academic, commercial, governmental, and
non-commercial web sites around the world.

http://djvu.sourceforge.net/index.html