A computer program and computer-implemented method for assisting a use in selecting versions of a document to be compared and reviewed. The method may include storing a plurality of documents in a database and creating comparison documents that each depicts differences between different pairs of the documents. The method may also include selecting one of the documents to be a current document, then displaying comparison data for assisting the user in selecting one of the documents as a base document. The comparison data may include keyword search results and marked differences between user-selected sections of the documents as extracted from the comparison documents. Based on the comparison data, the user may select one of the documents in the database to be the base document. Finally, the method may include opening and displaying a specific one of the comparison documents associated with the current document and the base documents.