Thanks all replies
Shelly Shain,Eric Andersen and so on ...
I have looked arcview's help before but it seems i
skipped the subject

I just want to share what I have recieved from the
friends above
From the ArcView online help...
.shp - the file that stores the feature geometry.
.shx - the file that stores the index of the feature
geometry.
.dbf - the dBASE file that stores the attribute
information of features. When a shapefile is added as
a theme to a view, this file is displayed as a feature
table.
.sbn and .sbx - the files that store the spatial index
of the features. These two files may not exist until
you perform theme on theme selection, spatial join, or
create an index on a theme's Shape field. If you have
write access to the source data directory, the index
files will be persistent and remain after your ArcView
session is complete. If you do not have write access
to the source data directory, they will be removed
when you close the project or exit ArcView.
.ain and .aih - the files that store the attribute
index of the active fields in a table or a theme's
attribute table. These two files may not exist until
you perform Link on the tables. If you have write
access to the source data directory, the index files
will be persistent and remain after your ArcView
session is complete. If you do not have write access
to the source data directory, they will be removed
when you close the project or exit ArcView.

Thanks all who replied
/kursad
GIS Specialist



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