"New" and "Old" Media

This week we have learned the "New" and "Old" Media. The first question appearing in my mind when I see the title is that how to separate new and old media. That means I wanted to know the standard to say one thing is new media or old media? For example, is Computer belongs to new media or old media?
Our teacher gives us five considerations to separate them.
Systemic consideration considered that the basic imformation of a media production exsiting in the market such as its owner, copyright, regulation and the way to access the media production.
Technical consideration gives us a new yardstick to separate them. A new media is a digital and electric media, However, not all the digital and electric media are new media.
Aesthetic consideration. In my understanding about this part, new media always update to be more convenience, and the function of new media could impacted the majority of people. Another characteristic of new media is that people could communication and interact each other through new media.
Logical consideration. Old media always need large supporting from money, culture and technology. It survives hardly in modern life.
Political consideration. New media are seeing as a child in network soceity