File
Data file is refer to the information packed together may refer to a program or anything that you want to keep together. To refer to a data file within a program, you do not need to refer to that file in address directly. Let be a function of the operating system. In the operating system will have a operation called System call as the relevant Manager files, such as creating a file, delete a file read/write file System call by which is able to handle tasks related to file down to address of the file.