2D Barcoding of U.S http://cialisdanmark.net . Vaccines: an interview with Dr. Leonard Friedland, VP, Director, Scientific Affairs and Public Health, GSK Vaccines THE UNITED STATES Interview conducted by April Cashin-Garbutt, BA Hons How do two-dimensional barcodes change from the existing linear barcodes? 2D barcodes contain product identification, great deal number, and expiration date. Additionally, 2D barcodes have much more capacity and take up much less space. Why have GlaxoSmithKline recently announced that they will be placing two-dimensional barcodes on both inner containers and external boxes of nearly all their U.S.