An operation system of exhibition site for Internet includes one or more computers, and one or more server computers. Methods for treating a cancer are also provided in which the identified chemotherapeutic agents are administered to a subject. % of a cationic guar polymer; from about 5 to about 50 wt. In another embodiment of the invention, R1 and R2 are selected from C6 to C15 straight chain or branched alkyl groups. Ink-aware applications may call on methods of the electronic ink object to adjust formatting, search recognized ink along with text, and perform other functions.