Data tools Home / Variable Terms / Data tools Total products categorized with this term: 3 2011-2006 Census Tract correspondence file This file describes contains the complete relationship between the 2011 census tract and its component 2006 census tracts. Postal Code Conversion File, February 2018 THIS PRODUCT DOES NOT HAVE AN OPEN LICENSE. MEMBER ORGANIZATIONS CAN DOWNLOAD IT FOR INTERNAL USE ONLY. Beyond 20/20 Professional Browser Beyond 20/20 Professional Browser is an application that allows you to view and manipulate data. It is compatible with the .ivt file format.