| __utma | 
                                        Google | 
                                        Collects data on the number of times a user has visited the website as well as dates for the first and most recent visit. Used by Google Analytics. | 
                                        2 years from set/update | 
                                    
                                    
                                        | __utmb | 
                                        Google | 
                                        Registers a timestamp with the exact time of when the user accessed the website. Used by Google Analytics to calculate the duration of a website visit. | 
                                        30 minutes from set/update | 
                                    
                                    
                                        | __utmc | 
                                        Google | 
                                        Used by Google Analytics to calculate the duration of a website visit. | 
                                        End of session | 
                                    
                                    
                                        | __utmt | 
                                        Google | 
                                        Used to throttle request rate. | 
                                        End of session | 
                                    
                                    
                                        | __utmz | 
                                        Google | 
                                        Collects data on where the user came from, what search engine was used, what link was clicked and what search term was used. Used by Google Analytics. | 
                                        6 months from set/update | 
                                    
                                    
                                        | __utm.gif | 
                                        Google | 
                                        Supports the various Google Analytics cookies so we can view anonymous site usage. | 
                                        End of session |