and displayed if the reader is using a pc computer for example that result may be achieved by dragging the cursor to the cell and double clicking on it to open the e mail message in addition or in the alternative once the reader has indicated his her interest in a certain e mail message not only that specific e mail message is opened in full but also preceding e mail messages that belong to the very same thread of e mails will be opened in the alternative the preceding e mails may be e mails of the same subject and from the same sender not necessarily constituting a thread per se these preceding e mails may in turn appear at the user screen either in full or only in their characterizing images e g their abstracts as the case may be fig2 b illustrates the case where all the preceding e mails that belong to the thread of e mail messages associated with the one whose characterizing image was displayed at the top cell of the left column of fig2 a displaying grid become available for the reader there are a number of options for arranging the displaying grid all of which are encompassed within the scope of the present invention as already described one of the option is an.