org.apache.tomcat.core
Interfaces 
ContextInterceptor
Request
RequestInterceptor
RequestSecurityProvider
Response
ServerConnector
ServletLoader
SessionManager
Classes 
BaseInterceptor
BufferedServletInputStream
BufferedServletOutputStream
Constants
Container
Context
ContextManager
HttpServletRequestFacade
HttpServletResponseFacade
RequestDispatcherImpl
RequestImpl
ResponseImpl
ServletContextFacade
ServletWrapper
SessionContextImpl
SimpleRequestSecurityProviderImpl
Exceptions 
TomcatException