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Due to the widespread availability of computers and software packages, analysis of surveillance data has become quicker and easier. Large amounts of data are easily organized and routine analyses performed automatically. Epi Info, a word processing, data base, and statistical analysis software package developed by the CDC is used by many health departments in the United States to enter and analyze data, and generate summary reports. Mapping case information is also important; many health departments use Epi Map, also developed by the CDC, for this purpose. It is important to remember that although computers help us analyze data, no analyses or presentations of surveillance data routinely require use of a computer. Most analyses are simple and can be done by hand or using a calculator, and presented using graph paper and colored pencils.