Here is a list of all namespaces with brief descriptions:

[detail level 12345]

▼Nactivemq	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements
Ncmsutil
Ncommands
▼Ncore
Nkernels
Npolicies
Nexceptions
Nio
Nlibrary
Nstate
Nthreads
▼Ntransport
Ncorrelator
Nfailover
Ninactivity
Nlogging
Nmock
Ntcp
Nutil
▼Nwireformat
▼Nopenwire
▼Nmarshal
Ngenerated
Nutils
Nstomp
Ncms	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements
▼Ndecaf	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements
▼Ninternal
Nio
▼Nnet
▼Nssl
Nopenssl
Ntcp
Nnio
▼Nsecurity
▼Nprovider
Ncrypto
▼Nutil
Nconcurrent
Nio
▼Nlang
Nexceptions
▼Nnet
Nssl
Nnio
▼Nsecurity
▼Nauth
Nx500
Ncert
▼Nutil
Ncomparators
▼Nconcurrent
Natomic
Nlocks
Nlogging
Nzip
Nstd