Sierra Leone
constitutional democracy

Singapore
parliamentary republic

Slovakia
parliamentary democracy

Slovenia
parliamentary democratic republic

Solomon Islands
parliamentary democracy

Somalia
no permanent national government; transitional,
parliamentary federal government

South Africa
republic

Spain
parliamentary monarchy

Sri Lanka
republic

Sudan
authoritarian regime - ruling military junta took power in
1989; government is run by an alliance of the military and the
National Congress Party (NCP), formerly the National Islamic Front
(NIF), which espouses an Islamist platform