Handheld devices refer to small electronic devices that can be held and operated using one hand. These devices typically have a small form factor and are designed for portability and ease of use. Examples of handheld devices include smartphones, tablets, e-readers, handheld gaming consoles, and handheld GPS devices. Research in the area of handheld devices focuses on improving the design, functionality, and usability of these devices. This may involve researching new technologies, such as touchscreen interfaces or biometric security features, as well as studying user behavior and preferences to create more intuitive and user-friendly interfaces. Additionally, research in this area may also explore the impact of handheld devices on society and individuals, such as their effects on communication, information consumption, and productivity. Overall, research in the field of handheld devices aims to enhance the user experience and capitalize on the potential of these devices for various applications and industries.