A handheld computer is a small electronic device that can be easily held in the hand. It is commonly known as a personal digital assistant (PDA), which allows users to perform various tasks such as scheduling, emailing, web browsing, and text messaging. Other synonyms for a handheld computer include a handheld device, mobile computer, palmtop computer, pocket computer, smartphone, and mobile phone. All of these devices have evolved over time, becoming smaller, more powerful, and feature-rich, providing people with more flexibility and convenience in their daily lives. The use of handheld computers has revolutionized the way we communicate, work, and access information and will continue to impact every aspect of society in the years to come.