Business Addresses Kept on Separate Small Entries

This page is the CodyCross answer for the clue below from Extraordinary Creatures, Group 1581, Puzzle 4 (Bridge Trolls).

Question is: Business Addresses Kept on Separate Small Entries

and the answer is: CARDINDEX

Word Meaning:

CARD INDEX — (libraries, business) Any index formed with index cards, as was common in many businesses before the microcomputer revolution.

Definitions from Wiktionary.