Radios: This entry gives the total number of radio receivers.
Railways: This entry includes the total length of the railway network and component parts by gauge: broad, dual, narrow, standard, and other.
Reference maps: This section includes world, regional, and special or current interest maps.
Religions: This entry includes a rank ordering of religions starting with the largest and sometimes includes the percent of total population.
Sex ratio: This entry includes the number of males for each female in five age groups—at birth, under 15 years, 15-64 years, 65 years and over, and for the total population. Sex ratio at birth has recently emerged as an indicator of certain kinds of sex discrimination in some countries. For instance, high sex ratios at birth in some Asian countries are now attributed to sex-selective abortion and infanticide due to a strong preference for sons. This will affect future marriage patterns and fertility patterns. Eventually it could cause unrest among young adult males who are unable to find partners. The sex ratio at birth for the World is 1.06 (1999 est.).
Suffrage: This entry gives the age at enfranchisement and whether the right to vote is universal or restricted.
Telephone numbers: All telephone numbers in the Factbook consist of the country code in brackets, the city or area code (where required) in parentheses, and the local number. The one component that is not presented is the international access code, which varies from country to country. For example, an international direct dial telephone call placed from the US to Madrid, Spain, would be as follows:
011 [34] (1) 577-xxxx where
011 is the international access code for station-to-station calls
(01 is for calls other than station-to-station calls),