The last one enables raw input from your mouse device. (apgnation.com)
We fixed an issue where the mouse response might appear erratic on certain devices when playing games with Raw Input disabled. (blogs.windows.com)
The first layer of digital «neurons» — called nodes — receives raw inputs (such as pixels in a photograph of a cat), mixes and scores these inputs according to simple mathematical rules, and then passes the outputs to the next layer of nodes. (scientificamerican.com)