Binary descriptions:

am-utils: No summary available for am-utils in ubuntu vivid.
am-utils-dbgsym: debug symbols for package am-utils
am-utils-doc: automounter utilities documentation
libamu-dev: Support library for amd the 4.4BSD automounter (development)
libamu4: Support library for amd the 4.4BSD automounter (runtime)
libamu4-dbgsym: debug symbols for libamu4