Here is a list of all namespaces with brief descriptions:

[detail level 12345]

Ncxx14
Ndetail
NGU_VDBPointToolsInternal
Nhoudini_utils
Nllvm
▼Nnanovdb
Nbuild
Ncrc32
▼Nio
NInternal	Internal functions for compressed read/write of a NanoVDB GridHandle into a stream
▼Nopenvdb
▼Nv11_0
▼Nax
▼Nast
Ntokens
▼Ncodegen
Ncodegen_internal
Nmath
Ncompression
Ninternal
Nio
Nlogging
▼Nmath
Nmat3_internal
▼Npcg
Ninternal
▼Npoints
Nattribute_traits
Nfuture	A container for ABI=5 to help ease introduction of upcoming features
Nindex
Ninternal
Npoint_attribute_internal
Npoint_move_internal
Npoint_rasterize_internal
Ntransfer_internal
Nstring
▼Ntools
Ncomposite
Nds
Ngridop
Nlocal_util
Nlstrack
Nmorphology
Npoisson
NScheme
Nvalxform
▼Ntree
Niter
Nleafmgr
Ntypes_internal
Nutil
▼Nopenvdb_houdini
Nnode_info_text	Namespace to hold functionality for registering info text callbacks. Whenever getNodeSpecificInfoText() is called, the default info text is added to MMB output unless a valid callback has been registered for the grid type
NOSN
Nstd
Nunittest_util