According to Colon Classification, which ACI is used to form the class number for "Biography of Prime Minister"?

The Correct answer is y7

Key Points

• In the Colon Classification (CC) system, which was developed by Dr. S. R. Ranganathan, each symbol or notation stands for a particular concept
• y7: This symbol generally refers to individuals who are prime ministers, according to the geographic notation of Ranganathan's Colon classification.

Additional Information

• Kinds of Common Isolates:
• Ranganathan divided the Common Isolates into two categories and further subcategories, which may be best represented diagrammatically.
• Broadly speaking they are of two kinds: 1. Anteriorising Common Isolates (ACIs) 2. Posteriorising Common\ Isolates (PCIs) 
  • Anteriorising Common Isolates (ACIs):
    • When attached to a subject they give it an anterior position over other subjects of the same class.
    • Another feature is that they do not require any connecting symbol in the CC-6.
    • Documents attached with AnteriorisingCommon Isolates (ACIs) form the approach documents on the shelves in the CC-6 they are of three kinds
    • Some of the common isolates in the CC-6 are
      • a Bibliography
      • k Encyclopedia
      • m Periodical
      • p Conference
      • v History
      • r Report
      • s Statistics
      • w Biography
  • Posterorising Common Isolates (PCIs).
    • These require a connecting symbol and are filed after the core documents:
    • Energy PCIs:
      • b2 Designing
      • f Research
      • g Critical Study
    • Personality PCIs
      • d Institutions
      • e Educational institutions
      • g Associations