The GfKl unites numerous specialist work groups. On the one hand, they organize events during the annual GfKl conference and on the other hand smaller independent meetings.
Currently there are the following working groups:
- Data Analysis and Numerical Classification (AG DANK)
- Classification and Data Analysis in Bio Sciences (AG BT)
- Library and Information Science (AG BIB)
- Decimal Classification (AG DK)
- Data Analysis in Archeology (AG CAA)
- Data Analysis and Classification in Marketing (AG MARKETING)
In addition, there have already been numerous, further working groups (AG) and special interest groups (SIGs) in the past:
- General principles (SIG AG)
- Formal conceptual analysis (SIG BA)
- Conceptual principles of classification (SIG BG)
- Library Classification (SIG BK)
- Information systems (AG IS)
- Problems of product classification (SIG WK)
- Indexing languages: structure and application (SIG SI)
- Terminology of classification (SIG TK)