What are the Servlets Equivalents of CGI for commonly requested variables?

SERVER_NAME =request.getServerName();
SERVER_SOFTWARE =request.getServletContext().getServerInfo();
SERVER_PROTOCOL =request.getProtocol();
SERVER_PORT =request.getServerPort()
REQUEST_METHOD =request.getMethod()
PATH_INFO =request.getPathInfo()
PATH_TRANSLATED =request.getPathTranslated()
SCRIPT_NAME =request.getServletPath()
DOCUMENT_ROOT =request.getRealPath("/")
QUERY_STRING =request.getQueryString()
REMOTE_HOST =request.getRemoteHost()
REMOTE_ADDR =request.getRemoteAddr()
AUTH_TYPE =request.getAuthType()
REMOTE_USER =request.getRemoteUser()
CONTENT_TYPE =request.getContentType()
CONTENT_LENGTH =request.getContentLength()
HTTP_ACCEPT =request.getHeader("Accept")
HTTP_USER_AGENT =request.getHeader("User-Agent")
HTTP_REFERER = request.getHeader("Referer")