Barcodes are powerful design icons. We have developed barcode systems for many types of project. Sometimes they are integral to an interactive - for example, a robot tortoise that is controlled by the visitor scanning barcoded cards. Alternatively, barcoded tickets or wristbands can be given to exhibition visitors to allow them to personalise their experience. A good example of this is our award-winning voting system developed for the Taking Liberties exhibition at the British Library.