1. A method for extracting and presenting information for document segments, comprising: obtaining a document, wherein the document is in the form of a communication thread, wherein the document comprises multiple segments, wherein at least two of the segments are created by different persons, wherein the multiple segments are chronologically organized based on the time each segment is added to the document; identifying the first chronological segment in the document, wherein the first chronological segment contains the content that is most recently added to the document by a specific person in the communication thread, wherein the content of the first chronological segment is a response to the content of a different segment in the document created by a different person at a different time; dividing the document into a first part and a second part, wherein the first part comprises the first chronological segment, wherein the second part comprises the portion of the document that is not the first chronological segment; extracting the content of the first part for analysis; identifying one or more terms in the content of the first part, wherein a term can be a word or phrase or sentence or paragraph; selecting the one or more terms; and storing or displaying the selected terms to represent a topic or summary of the document or a chronologically newer content in the document.
6. The method of claim 1 , wherein an importance measure is determined for the one or more terms in the first chronological segment, wherein the one or more terms are selected based on the importance measure.