D_DOS

  approach: We compiled a, to our knowledge, complete list of mobile barcode scanner companies. We asked each scanner provider to send us their software on the device they consider best for their software. We contacted 13 scanner providers in total, of which 2 refused to send a handset, 11 sent their preferred handset (see Figure 2). Another influence factor we balanced out is that some scanners call a website and only then display the scanned barcode. In order to factor out these Fig. 3. Procedure: introduction, testing of scanners, scanning of products Fig. 4. Scanning of the three test products chips, detergent, and pesto. delays the time was stopped as soon as the screen of the mobile phone switched to open the Internet browser. 3) Environment: The study was run in a close-to-reality