Even the word ‘science' comes from an Indo-European root meaning ‘to cut' or ‘to separate.' The same root led to the word ‘shit,' which of course means to separate living flesh from nonliving waste. The same root gave us ‘scythe' and ‘scissors' and ‘schism,' which have obvious connections to the concept of separation.

In your high school geology class you probably were taught that all life on earth exists in a paper-thin shell called the biosphere, which is trapped between thousands of miles of dead rock underfoot, and cold dead radioactive empty space above. Companies that sell OSes exist in a sort of technosphere. Underneath is technology that has already become free. Above is technology that has yet to be developed, or that is too crazy and speculative to be productized just yet. Like the Earth's biosphere, the technosphere is very thin compared to what is above and what is below.