Here is a list of all namespaces with brief descriptions:

[detail level 1234]

Na
Nab_json
Nb
►Ncli
Nasync_shell
Nkernel
Nkmain
Nparsers
Nseq_server
Nseqdraw
Nseqlist
Nseqrun
Nshell
Nshell_main
Nutil
Nconf
Nconftest
Ndialog
Nembed_a
►Ngui
Ncheck_server_status
Nclient
►Ncomms
Nlogs_client
Nredthread
Nserver
Nstate_client
Nxtest_comm_logs
Nxtest_comms_state
Nconfig_file
Nerr_display_dialog
Nicons
►Nmodel
Nparammodel
Nsequencer_logs_model
Nsequencermodel
NsequencerStdModel
Notto_config_dialog
Notto_interface
Notto_oblist_dialog
Nparse
NseqguiMain
Nserver_dialog
►Nutils
Nlogger
►Nwidgets
NcomboEditor
Ndelegate
NledOutput
Nmcb
Nqdialogboxes
Nqseqtreeview
Nqvarstreeview
Nsequencer_logs_view
Nsplash_window
Niseq
►Nlib
Ncontextvars_executor
Ncounter
Nexc
Nget_config
►Nip
Nipconfig
Nkeywords
Nlog
Nmodule_loader
►Nnodes
Naction
Ncheckbox
Ncompress
Ndialogs
Ninterface
Nloop
Nmonitor
Nnode_exception
Nobserving_block
Nparallel
►Nparams
Nparam_astro
Nparam_keyword
Nparam_number
Ntemplate_domain
Ntemplate_param
Nrecover
Nreporting
Nrtflags
Nsequence
Nshortcuts
Nstate
Ntemplate
Nutils
Nob
Npartial
Nredirect
Nseqtask
Nsession
Nloop1
NobgwOtto
►Notto
Nobgw
Notto_client
NottoSim
►Nsamples
Na
Na_dbg
Nadd
Nb
NbasicDialog
Nboolvar
Ncheckbox
NdialogSample
Neloop
Nembed_a
Nembed_a_err
Nerrloop
Nform
Nfors_mwe
Nfs_pycloc
Nfs_worker_01
Nloop1
Nloop_b
Nloop_in_loop
NmessageBox
NnonModalDialog
None
None_checkbox
Npar_ex
Nqd2
Nsubp
Ntest_err
Ntest_err_cover
Ntpa
NseqMainWindow
Nseqtool
Nsetup
►Ntest
Nconftest
Nerrloop
►Nlocal
Na
Nadd
Nb
Ncheck_par_values
Ndummy
Neloop
Nerrloop
Ntest_err
Ntpl_b
Ntpl_set_values
Nmod
Ntest_attrs
Ntest_checkbox
Ntest_compress
Ntest_ctx
Ntest_EICSSW-1666
Ntest_EICSSW-2786
Ntest_EICSSW-2823
Ntest_EICSSW-3296
Ntest_EICSSW-3297
Ntest_err1
Ntest_err2
Ntest_find
Ntest_interface
Ntest_ivo
Ntest_loader
Ntest_make_node
Ntest_ob
Ntest_obs_block
Ntest_partial
Ntest_pause
Ntest_seq_embed
Ntest_shortcuts
Ntest_subp
Ntest_client
Ntest_draw
Ntest_edit_variables
Ntest_eicssw_1185-remote-logging
Ntest_eicssw_1407_first_ob_load_fails
Ntest_eicssw_1425_loads_template
Ntest_eloop
Ntest_gui_connect
Ntest_kernel
Ntest_kernel_variables
Ntest_logs_model
Ntest_logs_proxy
Ntest_logs_view
Ntest_loop
Ntest_loop_cv
Ntest_loop_fails
Ntest_loop_inherit
Ntest_loop_simple
Ntest_param_int
Ntest_param_keyword
Ntest_param_number
Ntest_param_number_domain
Ntest_param_numlist
Ntest_radec
Ntest_rcv1
Ntest_recover2
Ntest_server_commands
Ntest_server_connection
Ntest_template
Ntest_template_params
Ntest_template_params2
Ntest_treeview
Ntpa
Nwscript