Here is a list of all namespaces with brief descriptions:

[detail level 123]

Nconf
▼NElgg	Save menu items
NAdmin	Upgrade object for upgrades that need to be tracked and listed in the admin area
NAmd
NAssets
NCache
NCore	Activate a plugin or plugins
NDatabase
▼NDebug
NInspector
NDi
NFilesystem
NForms
NHttp
NI18n
NJson
NNotifications
NProject
NQueue
NSecurity
NStructs
NUpgrades
Nelgg_rtd_theme
NSingleton	Object for holding the Elgg javascript library