Multiple choice

Which of the following is the post-coordinate indexing system?

  1. PRECIS

  2. Peek-a-Boo

  3. POPSI

  4. SLIC
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Peek-a-Boo is a post-coordinate indexing system that uses optical coincidence cards with holes representing terms. When multiple cards are superimposed, light passes through common holes, revealing documents containing all specified terms. This true post-coordinate system allows for any combination of terms at search time, unlike PRECIS and POPSI which are pre-coordinate systems with fixed phrase structures.

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