v0.2, 10 September 1999, changed <htmlurl ... > tag to <url ...>, another motto, added appendix B about MP3 player, created and added eco_com mailing list, added chapter about alternative power supplies, added recommendations for buying a new computer, improved screensaver section, added UPS chapter, added chapter about hardware design, minor changes
v0.3, 17 September 1999, added information about Tierra, added information about wasting of resources during computer production, added some comments about UPS, minor changes
v0.4, 05 December 1999, added appendix G about other operating systems, added information about CD recycling, added appendix H URLs of recyclers, removed link to Linux Games Survey, added links to SWARM, UNCERT and Climate-Dynamics, added chapter about Energy Star label (courtesy of Robert Horn), minor changes
v0.5, 04 January 2000, some additional information about PostScript utilities, new chapter Caveats, URL corrections and minor changes
v0.6, 01 March 2000, link to Japanese translation added and some spell checking (thanks to Jun Morimoto), correction of URLs
v0.7, 14 April 2000, new chapter about double sided printing, some links added to the Games chapter, Power Management Unit - PMU section added, proposition of Chinese translation
v0.8, 4 November 2000, some more hints on using small space and small memory added, new chapter about Linux applications for old hardware, some more hints how to save paper included, proposal of Portuguese translation, links updated, new document URL, minor changes
v0.9, 27 February 2003, some links corrected (TuxMobil.org, tldp.org), minor changes
