\input zb-basic \input zb-ioport \iteman{io-port 05501902} \itemau{Moshnyaga, Vasily G.} \itemti{Untraditional approach to computer energy reduction.} \itemso{Svensson, Lars (ed.) et al., Integrated circuit and system design. Power and timing modeling, optimization and simulation. 18th international workshop, PATMOS 2008, Lisbon, Portugal, September 10--12, 2008. Revised selected papers. Berlin: Springer (ISBN 978-3-540-95947-2/pbk). Lecture Notes in Computer Science 5349, 82-92 (2009).} \itemab Summary: This paper analyzes energy consumption of computer lifetime stages: manufacturing, usage and end-of-life. It shows that despite high energy costs of manufacturing, computer is used only a fraction of its expected lifetime. Reusing computers could significantly amortize the energy of production and eventually save energy. \itemrv{~} \itemcc{} \itemut{} \itemli{doi:10.1007/978-3-540-95948-9\_9} \end