Scientific, photographic, optical, weighing, and measuring apparatus and instruments, namely, smart watches, weighing scales, thermometers, global positioning system (GPS) apparatus, hydrometers, and height gauges to test and manage blood glucose, carbohydrate intake, calorie intake, and physical activity, and to calculate and manage insulin dosage, and to provide related reports and alerts; apparatus for recording, transmission, or reproduction of sound or images; magnetic recording media, s...