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.
Homogenization: A Closer Look. Raw milk, as it comes from the cow, is an emulsion- a mixture of milk-fat globules, various solids and water. Over time, the fat globules separate out and rise to the surface as a layer of cream, leaving what is essentially skim milk, down below.