Which concept groups materials by subjects using numeric codes?

Which concept groups materials by subjects using numeric codes?

• A. Dewey Decimal Classification (DDC)
• B. Main Classes of DDC
• C. Visual Appeal
• D. Recreational Reading

Answer: (A)

Grouping library materials by subject using numeric codes is a way a library organizes books so you can find items by topic. The Dewey Decimal Classification uses a decimal number system to represent subjects, with broad areas in the 000s–900s and more specific topics in the decimals. For example, astronomy sits around the 520s, physics around the 530s, and so on. This numeric structure makes it easy to add new topics and keep related books together, aiding both shelving and browsing by subject. One option refers only to the top-level divisions within this system, which is a part of how it’s organized but doesn’t by itself describe the overall method of grouping by subjects with numbers. Other options describe appearance or reading preferences, not how materials are classified by subject with numeric codes.

Grouping library materials by subject using numeric codes is a way a library organizes books so you can find items by topic. The Dewey Decimal Classification uses a decimal number system to represent subjects, with broad areas in the 000s–900s and more specific topics in the decimals. For example, astronomy sits around the 520s, physics around the 530s, and so on. This numeric structure makes it easy to add new topics and keep related books together, aiding both shelving and browsing by subject. One option refers only to the top-level divisions within this system, which is a part of how it’s organized but doesn’t by itself describe the overall method of grouping by subjects with numbers. Other options describe appearance or reading preferences, not how materials are classified by subject with numeric codes.