Here is a list of all namespaces with brief descriptions:

[detail level 12345]

Naccessibility
Ncalc
▼Ncom
▼Nsun
▼Nstar
Naccessibility
Nawt
Nbeans
Nchart
▼Nchart2
Ndata
Ncontainer
Ndatatransfer
Ndocument
Ndrawing
Nembed
Nform
Nframe
Ni18n
Nio
Nlang
Nreflection
▼Nscript
Nvba
Nsdbc
▼Nsheet
Nopencl
Nstyle
Ntable
Ntask
Ntext
Nucb
Nui
Nuno
Nutil
Nview
▼Nxml
Nsax
▼Ncomphelper
Nservice_decl
▼Ncondformat
Ndialog
Nentry
Ndatabar
Ndetail
▼Ndrawinglayer
Nprocessor2d
Nediteng
Nformula
NHelperNotifyChanges
Nmatop
Nnaturalsort
No3tl
▼Nooo
▼Nvba
Nexcel
▼Noox
Ncore
▼Ndrawingml
Nchart
Nole
Nxls
Nosl
Nrtl
Nsax_fastparser
▼Nsc	CAUTION! The following defines must be in the same namespace as the respective type
Ndatastreams
Nop
Nopencl	Arguments that are actually compile-time constant string Currently, only the hash is passed
Nsidebar
Ntools
NScClipUtil
NScPassHashHelper
NScRefTokenHelper
NScXMLConditionHelper
▼Nsdr
Ncontact
Noverlay
Nsfx2
NSpellCheckContext
Nsvl	These need to be in global namespace just like their respective types are
Nsvtools
▼Nsvx
Nsidebar
Ntools
Nutl
Nvcl
Nweld
▼Nxcl
Nexp
NXclExpFontHelper	Helper functions for font export