Here is a list of all namespaces with brief descriptions:

[detail level 12345]

Ncxx14
Ndetail
Nnanovdb
Nbuild
Ncrc32
Nio
NInternal	Internal functions for compressed read/write of a NanoVDB GridHandle into a stream
Nopenvdb
Nv11_0
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
Nstd