| aut | Austria |
| bel | Belgium (Flanders) |
| can | Canada |
| chl | Chile |
| cyp | Cyprus |
| cze | Czech Republic |
| deu | Germany |
| dnk | Denmark |
| esp | Spain |
| est | Estonia |
| fin | Finland |
| fra | France |
| gbr | United Kingdom (England and Northern Ireland) |
| grc | Greece |
| idn | Indonesia |
| irl | Ireland |
| isr | Israel |
| ita | Italy |
| jpn | Japan |
| kor | South Korea |
| ltu | Lithuania |
| nld | Netherlands |
| nor | Norway |
| nzl | New Zealand |
| pol | Poland |
| RPIAAC | RPIAAC: datasets from the Survey of Adult Skills (PIAAC) |
| rus | Russian Federation |
| sgp | Singapore |
| svk | Slovak Republic |
| svn | Slovenia |
| swe | Sweden |
| tur | Turkey |
| usa | United States |
| variable_coding | Coding scheme for a PIAAC variable |
| variable_info | Return information on PIAAC variables |
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