Tablet PC manufacturers mainly use the three major operating systems of Android, iOS and Windows, and many MID vendors generally develop their own or use open software to develop operating systems.
So the two actually have the essential difference. The tablet computer is a standard computer, but the input device is replaced by the touch screen, and the body parts are more integrated and can be smaller. The MID is just like a mobile phone, but it has more computer functions than a mobile phone and has a device with mobile storage. It is not a computer.
Generally speaking, MID is a portable device with a screen larger than the average mobile phone and smaller than the tablet, the function is equal to or stronger than the mobile phone, but smaller than the tablet, can not be connected to the mouse and keyboard, and can be connected to the inter-chain network. The tablet is a reduced and touch-enabled computer.
Now, with the development of the times, especially the popularity and technology of mobile phones and tablets, many functions of MID now overlap with mobile phones and tablets, and the definition between them is gradually blurred. I believe that in the future, the tablet, Mobile phones, MIDs will become more and more similar, and even gradually one.