This Revision, which comes in three disks containing estimates and projections on national populations by five-year age group and sex for 1950-2100, provides a comprehensive and consistent set of population data for the world's countries and their aggregates. The Comprehensive CD-ROM contains all essential data such as total births, total deaths, total net-migration, the respective crude rates, life expectancy at birth by sex, infant and child mortality, summary measures of adult mortality and deaths by broad age groups, total fertility, net-reproduction rate and population growth rates. The Extended DVD-ROM contains all the data from the Comprehensive CD, plus population figures by single calendar year and single age group. The DVD-ROM for Special Aggregates contains a subset of indicators from the extended dataset aggregated for 276 functional groupings such as: 30 geographical regions, 54 economic and trading groups, 32 political groups, 90 United Nations regional groups, and 70 ecological groups