Users create this software themselves and often overlook how important it is. In some types of embedded systems, the application software and the operating system software may be indistinguishable to the user, as in the case of software used to control a VCR, DVD player or Microwave Oven.
You can jam milk through pretty small holes with force like that. Before homogenization, fat globules range in size from 1-10 microns (a micron = ~0.00004 inch). After, the size range is reduced to 0.2-2 microns.
The process of homogenizing of milk involves mixing the cream content into the milk itself. Where does the cream come from? Well, when you milk a cow the cream flows to the top. During the homogenization process, the fat from the cream is broken down so it is absorbed into the milk.