Operating System (OS) is the answer.
An application runs in/on an OS. It is not the OS itself. Like Word or Chrome are applications.
Systems is too generic and not specific enough to mean anything in this context. Throw away answer.
Network Operating System does not 'usually' run on a hard drive but on memory chips in things like routers, wireless access points and switches that move network traffic.
Number 2 is the correct answer
Flowchart - diagram created by different shapes to show flow of data
algorithm - step by step procedure to solve the problem
A flowchart is a representation of an algorithm
It would be version 14.04! I run Ubuntu Linux on my pc with dual boot with Kali Linux! I hope this helped!
