.fweb --- Initialization file; always in the home directory.
fweb.sty --- Style file; in current directory unless changed by environment variable FWEB_STYLE_DIR. The basic name can be changed by the -z option. *Note -z::
name.web --- Source code.
name.ch --- Change file.
name.hweb --- Code included into web file with @i. *Note @i:: Include files are searched for in the path set by the environment variable FWEB_*INCLUDES and/or the -I option. *Note -I:: If that path is empty, then the current directory is searched.
name.hch --- Change file for include file.