The number and letter are switched. This question needs more context to get a accurate answer.
Answer: Utility Software
Explanation:
Utility software is software designed to help to analyze, configure, optimize or maintain a computer. It is used to support the computer infrastructure - in contrast to application software, which is aimed at directly performing tasks that benefit ordinary users.
50 because the negative doesn’t matter when getting an absolute value

Your answer is such a genius. :)
