Operating Systems

Part I
As a system administrator who is responsible for your company’s network, you understand that operating systems (OS) are various. Discuss the following queries:
Why are there so many versions of OS?
What are the features that make them different?
Explain the pros and cons of each.
Part II
Familiarize yourself with the historical evolution of OS. Select 2, and then talk about them in terms of various aspects (e.g., encryption, size, speed, memory, video, and security). Respond to the following 2-part question:
How can the evolution of OS (1) benefit an organization and (2) cause harm to an organization?
Please provide proper references and use APA formatting (400-600 words)