Hypertext Transfer Protocol is the protocol used by the World Wide Web to access web pages. The number of round trips that this protocol uses is more than necessary. T/TCP can be used to reduce the number of packets required.
HTTP is the classic transaction style application. The client sends a short request to the server requesting a document or an image and then closes connection. The server then sends on the information to the client. T/TCP can be used to improve this process and reduce the number of packets on the network.
With TCP, this is accomplished by connecting to the server (3-Way Handshake), requesting the file (GET <file>) and then closing the connection (sending a FIN segment). T/TCP would operate by connecting to the server, requesting the document and closing the connection all in one segment (TAO). It is obvious that bandwidth has been saved.
File Transfer Protocol is used to request a file from a server and download it onto the client. The improvements for HTTP are applicable to FTP.