This certificate confirms that Mr. Ritik Kumar Agrahari, Mr. Rajat Chourasia, and Mr. Dinesh Mahto, 3rd year computer science students at Indian Institute of Technology (ISM) Dhanbad, successfully built an Android application integrated with Bluetooth printing. The application allows for scanning 1D barcodes for inventory management and billing at retail outlets. They completed the project under the mentorship of Flick2Know Technologies from September 25, 2016 to December 30, 2016, meeting expectations and showing a strong desire to learn.