Here is a list of all namespaces with brief descriptions:

[detail level 1234]

Napr_environment
Ncmis
▼Ncom
▼Nsun
▼Nstar
Nbeans
Ncontainer
Nembed
Nframe
Nio
Nlang
Nscript
Nsdbc
Nucb
Nuno
Nutil
Ncomphelper
Nfileaccess
Nftp	Definition of ftpcontentprovider
Ngio
Nhcp_impl
Nhierarchy_ucp
Nhttp_dav_ucp
Npackage_ucp
Nrtl
Ntdoc_ucp
▼Nucb
▼Nucp
Next
Nucb_cmdenv
▼Nucb_impl
Nurihelper
Nucbhelper
Nwebdav_ucp