Archelaus (philosopher) Archelaus (philosopher) Archelaus (; ; fl. 5th century BCE) was an Ancient Greek philosopher, a pupil of Anaxagoras, and may have been a teacher of Socrates. He asserted that the principle of motion was the separation of hot from cold, from which he endeavoured to explain the formation of the Earth and the creation of animals and humans. Archelaus was a philosopher of the Ionian School, called "Physicus" from having been the first to teach natural philosophy at Athens. This statement of Diogenes Laërtius, is contradicted by Clement of Alexandria, but the two may be reconciled by supposing that Archelaus
Tub file Tub file The tub file was a technique used in the punched card era to speed generation of data files. Multiple copies of frequently used cards were prepunched and stored in trays with index tabs between card sets, arranged so that cards would be easy to find. For example, a wholesaler might have a tub file with cards for frequent customers and for each inventory item. Instead of keypunching a set of cards for each purchase order, a clerk would pull out a customer card and then a card for each item that customer ordered. The resulting deck could then