"Pagers 📟📠 are small communication devices that were widely used before the advent of mobile phones. They allowed people to receive short text messages or numeric codes, typically sent by a central paging service. Pagers were popular among professionals such as doctors, emergency personnel, and business executives who needed to stay reachable while on the go. Messages were sent by dialing a specific phone number and typing in the desired message using the buttons on the pager. Once received, the pager would emit a beeping sound or vibrate to alert the user. Pagers played a significant role in the evolution of mobile communication and were an essential tool for instant messaging before the rise of smartphones."