| unauthorized | Happstack.Server.SimpleHTTP, Happstack.Server |
| unBracket | Happstack.Util.Common |
| unEscape | Happstack.Server.SURI |
| unFilterT | Happstack.Server.SimpleHTTP, Happstack.Server |
| union | Happstack.Data.IxSet |
| unpad | Happstack.Crypto.W64 |
| unproxify | Happstack.Server.HTTP.Client, Happstack.Server |
| unProxy |
| 1 (Function) | Happstack.Data.Proxy, Happstack.Data.Serialize, Happstack.Data |
| 2 (Function) | Happstack.State |
| unrproxify | Happstack.Server.HTTP.Client, Happstack.Server |
| unsafeIOToEv | Happstack.State |
| unsafeSendFile | Network.Socket.SendFile |
| unsafeSendFile' | Network.Socket.SendFile |
| unsafeVolatileDirectoryGroup | Text.StringTemplate |
| unServerPartT | Happstack.Server.SimpleHTTP, Happstack.Server |
| ununWebT | Happstack.Server.SimpleHTTP, Happstack.Server |
| UnWebT | Happstack.Server.SimpleHTTP, Happstack.Server |
| unWebT | Happstack.Server.SimpleHTTP, Happstack.Server |
| Update |
| 1 (Data Constructor) | Happstack.State.ComponentSystem, Happstack.State |
| 2 (Type/Class) | Happstack.State |
| update | Happstack.State.Transaction, Happstack.State |
| UpdateEvent | Happstack.State.ComponentSystem, Happstack.State |
| UpdateHandler | Happstack.State.Transaction |
| updateIx | Happstack.Data.IxSet |
| uriRest | Happstack.Server.SimpleHTTP, Happstack.Server |
| u_path | Happstack.Server.SURI |
| u_scheme | Happstack.Server.SURI |
