operating system software and application software
I believe you mean iteration. Recursion is when you have a function that calls or uses it's self. it's advantageous because it reduces the amount of code but can fall victim to an endless loop. Iteration is using a while loop or any kind of loop to iterate through a data set normally an array, iteration allows you to do an action for every iterated item but a downside is that it takes a long time to iterate and it is not efficient
Answer: final notions on frequency, reach, and consistency.
If my answers wrong please tell me :D
Every program that interacts with people responds to a specific set of commands. The set of commands and the syntax for entering them is called the user interface and varies from one program to another. The DOS operating system makes a distinction between internal and external commands.