UDC Users Worldwide

Below we provide an overview of the distribution of UDC users by country and by languages. What is shown below is based on 2006 research and subsequent verification.

Table key

AUDC is used in the majority of libraries within the country and is the dominant classification system
BUDC is used in some type of libraries and in these countries it is used alongside other dominant classification system(s) such as DDC or some national classification system. UDC in these countries is a well known classification system and is also most likely to be taught in LIS schools (at least some).
Calthough there are libraries and information centres using UDC in these countries, the system is used rarely.

In 2012, we started a new study to find out the number of collections using UDC, the first results confirm that there are over 140,000 libraries using UDC in Europe alone. Below we provide a selection of larger databases indexed by UDC. See also: UDC users survey in Delhi 2007 - report published in Extensions & Corrections to The UDC, 30 (2008).

Overview of users by countries

EUROPE (41) A Albania, Andorra, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Repubic, Estonia, Hungary, Latvia, Liechtenstein, Lithuania, Macedonia, Moldova, Montenegro, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Ukraine
B Belarus, Belgium, Denmark, Finland, France, Norway, Russian Federation, Sweden, Switzerland
C Austria, Faroe Islands, Germany, Greece, Iceland, Ireland, Italy, Malta, The Netherlands, United Kingdom
ASIA (24) A Armenia, Azerbaijan, Georgia, Macao
B India, Indonesia, Israel, Japan, Kazakhastan, Kyrgyzstan, Uzbekistan, Vietnam
C Bangladesh, Bhutan, China, Malaysia, Singapore, South Korea, Sri Lanka, Syria, Taiwan, Tajikistan, Turkey, Turkmenistan
AFRICA (24) A Algeria, Angola, Burkina Faso, Congo DR, Mali, Mozambique, Sengal, Togo
B Benin, Cape Verde, Ghana, Guniea Bissau, Libya, Madagascar, Morocco, Niger, South Africa, Tunisia, Uganda
C Cameron, Kenya, Nigeria, Sudan, Tanzania
NORTH & CENTRAL AMERICA (9) A no countries with this type of usage
B Canada, Cuba, Costa Rica
C Barabados, Guatemala, Jamaica, Mexico, Trinidad and Tobago, USA
SOUTH AMERICA (11) A no countries with this type of usage
B Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Suriname
C Paraguay, Peru, Venezuela
AUSTRALIA & SOUTH PACIFIC (4) A no countries with this type of usage
B Australia, French. Polynesia, New Zealand
C Fiji


Overview of users by language

ENGLISHB:Australia, Finland, Norway, Ghana, South Africa, India, UK
B/C: Ireland, Canada, Uganda, Indonesia, Israel, New Zealand
C: Kenya, Nigeria, Tanzania, Bangladesh, Bhutan, Singapore, Sri Lanka, Fiji, Greece, Iceland, Malta, Trinidad & Tobago, USA, Sudan, Malaysia, Syria, Barbados, Jamaica
FRENCHA:Congo DR, Togo
B: France, Luxembourg, Tunisia
A/B: Belgium, Algeria, Burkina Faso, Mali, Senegal
B/C: Benin, Libya, Madagascar, Morocco, Niger, French Polynesia
C: Cameroon
PORTUGUESEA:Portugal, Angola
A/B:Mozambique, Macao (China)
B:Guinea Bissau, Brazil
B/C:Cape Verde
RUSSIANA/B:Armenia, Azerbaijan
B:Kazakhstan, Kyrgyzstan, Uzbekistan, Belarus, Russian Federation, Tajikistan, Turkmenistan
SPANISHA:Andorra, Spain
B:Cuba, Argentina, Uruguay
B/C:Costa Rica, Bolivia, Chile, Colombia, Ecuador, Guatemala, Mexico, Paraguay, Peru, Venezuela
OTHER LANG.AAlbania, Bosnia & Herzegovina, Croatia, Czech R., Estonia, Georgia, Hungary, Latvia, Lithuania, Macedonia, Moldavia, Poland, Romania, Serbia & Montenegro, Slovakia, Slovenia, Ukraine
B: Denmark, Sweden, Japan
B/C:Vietnam, The Netherlands, Surinam
C:China, Faeroe Islands, Italy, South Korea, Taiwan, Turkey