NCSA Mosaic for Microsoft Windows User's Guide
As mentioned above, hyperlinks can also point to images, sound files,
movies, and more. When a selected hyperlink points to a data resource
that NCSA Mosaic cannot handle internally, it displays the data file
by means of external viewers. These external viewers are independent
applications developed for viewing specific types of data. For example,
depending on how your system is configured, GIF images can be sent
by default to the program lview, a commonly-used image
viewer; audio files can be sent to the program wham.
NCSA Mosaic's use of external programs to handle specific data types
is completely configurable.
National Center for Supercomputing Applications / mosaic-win@ncsa.uiuc.edu