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 involves forcing the milk through small openings under high pressure, thus breaking up the fat globules. Cream and other food products, such as peanut butter, may also be homogenized to produce a stable emulsion, i.e., one in which fats or oils will not separate from other elements.