| Country | COUNTRY | NUMERIC | true | | | Nominal |
| Year of data collection | YEAR | NUMERIC | - | | | Scale |
| Employment status | EMPLY | NUMERIC | - | | | Nominal |
| Internet usage | USENET | NUMERIC | - | | | Nominal |
| Most important reason not to use the Internet | NONUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week home use of the Internet from a wired PC | HMUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week workplace use of the Internet from a wired PC | WRKUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week school use of the Internet from a wired PC | SCHLUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week using the Internet from anywhere else from a wired PC | ANYWUSE | NUMERIC | - | | | Nominal |
| Using the Internet through wireless device from anywhere | MOBUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week using the Internet through cell phone | CELLPUSE | NUMERIC | - | | | Nominal |
| Number of minutes per week using the Internet through wireless computer | WRLSSUSE | NUMERIC | - | | | Nominal |
| Number of months have been using the Internet | EXPNET | NUMERIC | - | | | Nominal |
| Number of times per month purchasing over the Internet | PURCHNET | NUMERIC | - | | | Nominal |
| Concerns about the security of credit/debit card information when buying/purchasing online | CARDSEC | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with people who share hobbies/recreational activities | NETCON1 | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with people who share political interests | NETCON2 | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with people with the same religion | NETCON3 | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with family members | NETCON4 | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with friends | NETCON5 | NUMERIC | - | | | Nominal |
| The use of the Internet has increased/decreased the contact with people in the same profession | NETCON6 | NUMERIC | - | | | Nominal |
| Since being connected to the Internet at home, the members of the household have spent more or less time together | FAMTIME | NUMERIC | - | | | Nominal |
| Since being connected to the Internet I have spent more or less time together with friends | FRIETIME | NUMERIC | - | | | Nominal |
| Changes in work performance/productivity because of Internet access at work | WORKIMP | NUMERIC | - | | | Nominal |
| By using the Internet one can have more political power | INTPOL1 | NUMERIC | - | | | Nominal |
| By using the Internet one will have more say in what government does | INTPOL2 | NUMERIC | - | | | Nominal |
| By using the Internet one can better understand politics | INTPOL3 | NUMERIC | - | | | Nominal |
| By using the Internet public officials will care more what one thinks | INTPOL4 | NUMERIC | - | | | Nominal |
| Reliability of the information on the Web | INFREL | NUMERIC | - | | | Nominal |
| Internet's importance as an information source | INFINT | NUMERIC | - | | | Nominal |
| Television's importance as an information source | INFTV | NUMERIC | - | | | Nominal |
| Newspapers' importance as an information source | INFPAP | NUMERIC | - | | | Nominal |
| Radio's importance as an information source | INFRAD | NUMERIC | - | | | Nominal |
| Interpersonal sources' importance as an information source | INFPER | NUMERIC | - | | | Nominal |
| Internet's importance as a source of entertainment | ENTINT | NUMERIC | - | | | Nominal |
| Television's importance as a source of entertainment | ENTTV | NUMERIC | - | | | Nominal |
| Newspapers' importance as a source of entertainment | ENTPAP | NUMERIC | - | | | Nominal |
| Radio's importance as a source of entertainment | ENTRAD | NUMERIC | - | | | Nominal |
| Number of minutes per week watching television | TIMETV | NUMERIC | - | | | Nominal |
| Number of minutes per week listening to radio | TIMERAD | NUMERIC | - | | | Nominal |
| Number of minutes per week reading newspapers | TIMEPAP | NUMERIC | - | | | Nominal |
| Number of minutes per week socializing face-to-face with friends | TIMEFRIE | NUMERIC | - | | | Nominal |
| Number of minutes per week socializing face-to-face with family | TIMEFAM | NUMERIC | - | | | Nominal |
| Doing more than one activity while online | MULTITASK | NUMERIC | - | | | Nominal |
| The type of Internet connection at home | CONTYPE | NUMERIC | - | | | Nominal |
| Frequency of checking email | EMAIL | NUMERIC | - | | | Nominal |
| Frequency of instant messaging | INSTMES | NUMERIC | - | | | Nominal |
| Frequency of participating in chat rooms | CHAT | NUMERIC | - | | | Nominal |
| Frequency of sending attachments with email | ATTMAIL | NUMERIC | - | | | Nominal |
| Frequency of making or receiving phone calls over the Internet | NETPHONE | NUMERIC | - | | | Nominal |
| Frequency of working on blog | WBLOG | NUMERIC | - | | | Nominal |
| Frequency of looking for news | NEWS | NUMERIC | - | | | Nominal |
| Frequency of looking for travel information | TRAVEL | NUMERIC | - | | | Nominal |
| Frequency of looking for job/work | JOB | NUMERIC | - | | | Nominal |
| Frequency of reading Blogs | RBLOG | NUMERIC | - | | | Nominal |
| Frequency of looking for humorous content | HUMOUR | NUMERIC | - | | | Nominal |
| Frequency of looking for health information | HEALTH | NUMERIC | - | | | Nominal |
| Frequency of playing games | GAMES | NUMERIC | - | | | Nominal |
| Frequency of downloading/listening to music | MUSIC | NUMERIC | - | | | Nominal |
| Frequency of downloading/watching videos | VIDEO | NUMERIC | - | | | Nominal |
| Frequency of looking at religious sites | RELIG | NUMERIC | - | | | Nominal |
| Frequency of listening to radio online | NETRADIO | NUMERIC | - | | | Nominal |
| Frequency of betting/gambling online | GAMBLE | NUMERIC | - | | | Nominal |
| Frequency of browsing the Web | BROWSE | NUMERIC | - | | | Nominal |
| Frequency of looking at sites with sexual content | SEXCONT | NUMERIC | - | | | Nominal |
| Frequency of looking for information about a product | INFPRO | NUMERIC | - | | | Nominal |
| Frequency of buying things online | NETPUR | NUMERIC | - | | | Nominal |
| Frequency of making travel reservations/bookings | TRAVRES | NUMERIC | - | | | Nominal |
| Frequency of paying bills online | NETBILL | NUMERIC | - | | | Nominal |
| Frequency of using bank's online services | NETBANK | NUMERIC | - | | | Nominal |
| Frequency of investing in stocks/funds/bonds | NETINV | NUMERIC | - | | | Nominal |
| Frequency of looking up the definition of a word | DEFLOOK | NUMERIC | - | | | Nominal |
| Frequency of finding/checking a fact | FACTCH | NUMERIC | - | | | Nominal |
| Frequency of getting information for school related work | SCHINF | NUMERIC | - | | | Nominal |
| Frequency of participating in distance learning for an academic degree or job training | DISTLEARN | NUMERIC | - | | | Nominal |
| Gender | GENDER | NUMERIC | - | | | Nominal |
| Age | AGE | NUMERIC | - | | | Nominal |
| Highest level of schooling completed | SCHOOL | NUMERIC | - | | | Nominal |
| Monthly gross family/household income | INCOME | NUMERIC | - | | | Nominal |
| Exchange rate to USD | EXCHRATE | NUMERIC | - | | | Scale |
| Marital status | MARSTAT | NUMERIC | - | | | Nominal |
| Number of people 18 years or older living in the household | ADULT | NUMERIC | - | | | Nominal |
| Number of children under 18 years old living in the household | CHILD | NUMERIC | - | | | Nominal |