1. A computer program product for use in a network system including at least two network devices network connectable so as to be capable of performing electronic mail operations, the computer program product comprising: a processor; and one or more computer-readable storage media having stored instruction that, when executed by the processor, implement a method for users of the at least two network devices to communicate via electronic mail, the method reducing the amount of input required by the users, wherein the method includes: a first network device receiving a first electronic mail message; automatically, and without user intervention, extracting one or more language expressions associated with the first electronic mail message; displaying one or more language expressions associated with the first electronic mail message at the first network device; receiving a user selection of one or more of the language expressions displayed at the first network device; and including the selected language expressions in a reply electronic mail message to the first electronic mail message.