Here is a list of all namespaces with brief descriptions:

[detail level 123]

Natsc
Natsc_sync_tag
Nboost
▼Ngnuradio
Ndetail
▼Ngr	Include this header to use the message passing features
▼Nanalog
Nkernel
▼Naudio
Nosx
▼Nblocks
Npdu
Nchannels
Ncomedi
Ndigital
Nfcd
Nfec
Nfft
▼Nfilter
Nkernel
Nimpl
Nmessages
Nnoaa
Npager
Nqtgui
Nthread
Ntrellis
Nuhd
Nvideo_sdl
Nvocoder
Nwavelet
Nwxgui
NIcePy
Npmt
Nrpcpmtconverter
Nsssr
Nuhd