Here is a list of all namespaces with brief descriptions:

[detail level 12345]

▼Neka2l1
Ndesktop
▼Nstd
N_LIBCPP_ABI_NAMESPACE
▼Nsymbian
►Nagent
CAgentLogPage	One bounded read result, including a lost-record signal
CAgentLogRecord	One retained event in the agent's own process
CAgentLogRing	Fixed 32-record service log with a monotonic sequence cursor
CControlMessage	Typed control envelope carried as MessagePack inside a wire frame
CFrame	One length-prefixed MessagePack payload, without a parsed schema
CFrameDecoder	Incrementally reads one network-order, 32-bit length-prefixed frame
CGuestControlRequest	One authenticated, read-only control request for the phone profile
CGuestDisplaySnapshot	Primary HAL display dimensions, if the platform reports them
CGuestFileEntry	One name in the agent-owned workspace, encoded as UTF-8
CGuestFilePage	A bounded listing of the agent-owned workspace root
CGuestStatusSnapshot	Optional, point-in-time native observations in a status response
CGuestTickSnapshot	Native tick reading exposed only after peer authentication
CInboundQueue	Completed inbound frames awaiting schema dispatch
►Nanalysis
Ninternal
CArmAttributes
CElf32Header
►Napi
►Ncamera
CCameraInventory
►Nconnectivity
CActiveTcpListener	A single pending RSocket accept managed by a Symbian active scheduler
CHttpClient	Native HTTP client over the existing worker-owned TCP runtime
CHttpServer	Native bounded HTTP listener; each accepted exchange owns its socket
CNativeActiveTcpListener
CNativeTcpClient
CNativeTcpListener
CNativeTcpSession
CTcpAcceptObserver	Receives one accepted stream or native error on the event thread
CTcpByteStream	Owning TCP transport for both HTTP and WebSocket streams
CTcpClient	One connected IPv4 TCP stream backed by Symbian RSocket
CTcpListener	One bounded IPv4 listener backed by Symbian RSocket
►CTlsStream	Worker-owned TLS transport for outbound HTTP and inbound sessions
CImpl
CWebSocketServer	Reusable bounded IPv4 WebSocket listener on a worker thread
CWebSocketStream	Synchronous worker-owned WebSocket using the SDK TCP runtime
►Ndisplay
CDisplayGeometry	Primary display geometry reported by the native HAL
CNativeDisplayReading
CResidentPanelOptions	Minimal Window Server panel for a manually started resident service
►Npower
CNativePowerReading
CPowerSnapshot
►Nstorage
CCopyProgress
CDirectoryEntry
CDirectoryReader
►CFileCopy
CState
CNativeDirectory
CNativeDirectoryEntry
CNativeFile
CReadOnlyFile
CWritableFile
►Nsystem
CFastCounterReading	Native 32-bit fast counter and platform-reported frequency
CTickReading	Native 32-bit elapsed-time tick and its measured period
►Nconcurrency
Ninternal
CBoundedChannel
CBoundedReader
CBoundedWriter
CEventExecutor
CEventMailbox
CFuture
CInlinePumpState
CNativeTaskOwner
CNativeTimer
CPromise
CPropertyWatch
CTaskGroup
CTimerPump
CUnit
►CWorkerExecutor	Bounded work destination on one guest OS thread
CDispatchHandle
►CState
CJob
CPolicy
►Ndevice
CMtpDeviceInfo
CMtpObjectInfo
CMtpStageResult	Result of a checked SIS transfer to an MTP Installs folder
CMtpStorageInfo
CUsbCdcUnion
CUsbCompletion
CUsbDeviceDescriptor
CUsbEndpointDescriptor
CUsbInterfaceAssociation
CUsbInterfaceDescriptor
CUsbPollFd
CUsbProbe
CUsbSession
►Ne32
Ninternal
CExportSlot
CImageInfo
CImportBlock
CImportSlot
►Nemulator
►CControlServer
►CImpl
CExitRecord
►Nhttp
Ninternal
CConnection	Worker-owned HTTP exchange with pull bodies and a response writer
►CHttp2	Bounded, I/O-free single-exchange nghttp2 connection
CState
CLimits
CRequestHead
CResponseHead
Nnative_error
►Nnet
CByteStream	Single-owner transport shared by HTTP and WebSocket connections
►Nsdk
CExport
CProxyInfo
CProxySources
►Nsis
CApplicationFile
►CPackageInfo
CEmbeddedFile
CPackageOptions
Nutf8
►Nwebsocket
Ninternal
COptions
►CWebSocket	Single-owner RFC 8441 WebSocket endpoint over nghttp2
CState
▼Nthread
Ninternal
CAlwaysSelectable
CCase	A Case represents a selectable case in a Select statement
CChannel	A Channel is a bounded FIFO queue that allows multiple readers and writers to communicate with each other
►CCondVar
CImpl
►CFiber
CImpl
►CMutex
CImpl
CMutexLock
CNonSelectable
CPermanentEvent
CReader	A Reader is used to read items from a Channel
CScheduler
CSchedulerParkGuard
CSchedulerPolicy
CWriter	A Writer is used to write items to a Channel