org.apache.http.protocol
Interfaces 
ExecutionContext
HttpContext
HttpExpectationVerifier
HttpProcessor
HttpRequestHandler
HttpRequestHandlerResolver
HttpRequestInterceptorList
HttpResponseInterceptorList
Classes 
BasicHttpContext
BasicHttpProcessor
HTTP
HttpDateGenerator
HttpRequestExecutor
HttpRequestHandlerRegistry
HttpService
RequestConnControl
RequestContent
RequestDate
RequestExpectContinue
RequestTargetHost
RequestUserAgent
ResponseConnControl
ResponseContent
ResponseDate
ResponseServer
SyncBasicHttpContext