Results for Jakarta (Indonesia) are not shown since the assessment was administered exclusively in paper and pencil format. The first is the proportion of adults who have sufficient familiarity with computers to use them to perform information-processing tasks. The second is the proficiency of adults with at least some ICT skills in solving the types of problems commonly encountered in their roles as workers, citizens and consumers in a technology-rich world. Three separate groups of adults fall into this category: adults with no computer experience, those who failed the "ICT core” test and thus did not have basic computer skills needed for the computer-based assessment, and adults who opted to take the paper-based version of the assessment even though they reported having previous computer experience. This ranged from less than 2% in Sweden (1.6%) and Norway (1.6%) to more than one in three adults inHirkey (35.6%) and more than one in five adults in Italy (24.4%) and the Slovak Republic (22.0%). A further 4.7% of adults did not have the basic skills that were assessed by the ICT core test, such as the capacity to use a mouse or scroll through a web page.