This chapter consists of a short history of the impact of computer technology on Christian evangelical mission research from the 1970's to the present. The trail winds through World Vision, MARC, the "World Christian Encyclopedia," "Operation World," SIL, OC International, DAWN, Global Mapping International, the AD2000 and Beyond Movement, and Joshua Project. Attention is given to projects in Asia, to some remarkable contributions from and to Silicon Valley, and to the origin of the well known missionary strategic map the "10/40 Window". It ends with a discussion of tools and tasks, of whether the Internet and computers have helped or harmed the Christian missionary enterprise. [For the full volume, see ED576666. This article was published published in the "International Bulletin of Missionary Research" under the title: "The Computer Revolution and Its Impact on Evangelical Mission Research and Strategy" (in January, 2009, 33,1, pp. 33-37).]