00377nam a2200121Ia 4500008004100000100001900041245007200060245001700132260002100149260000900170650002300179856005300202160227s9999    xx            000 0 und d  aDowney, A.B.,   aThink OS: A Brief Introduction to Operating Systems Version 0.5.0 /  cA.B. Downey.  bGreen Tea Press.  c2014  xOperating systems.  uhttp://www.greenteapress.com/thinkos/thinkos.pdf