File I/O stands for "File Input/Output," which refers to the process of reading data from and writing data to files on a computer. This allows programs to store information permanently or retrieve it later. For example, a text editor uses File I/O to open documents and save changes made by the user. In programming, File I/O is essential for managing data. Different programming languages, like Python or Java, provide libraries and functions to handle File I/O operations. These operations include opening files, reading their contents, writing new data, and closing files when done, ensuring efficient data management.