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.
Before the homogenization process, a layer of high-butterfat liquid is skimmed off the top of milk -- this layer is the heavy whipping cream. It contains between 36 and 40 percent fat; anything over 40 percent is classified as extra-heavy cream.