There are multiple frames through which to understand the different types of library classification systems, with individual library classification systems falling into several types. These frames and their respective types include:

By what is being classified:

• Book classification
• Bibliographic classification

By level of detail:

• Broad classification
• Depth classification

By scale of intended use:

• Specific/special classification
• National classification
• General/universal classification

By organizational structure:

• Enumerative classification
• Hierarchical classification
• Faceted/Analytico-synthetic classification