The acronym "PDA" can refer to several different concepts depending on the context. Here are a few common meanings:
1. **Personal Digital Assistant**: This refers to a mobile device that functions as a personal organizer. In the past, PDAs were handheld devices that combined features such as a calendar, address book, and task manager. They were popular before smartphones became ubiquitous.
2. **Public Display of Affection**: In social contexts,