card-index

基本解释

During the 1920s Fisher became rich from the invention and sale of a card-index system.
在20世紀20年代，費雪因爲發明和銷售卡片索引系統成了富翁。
The librarians have compiled a card-index catalogue so that they can afford facilities for reference.
爲便於蓡考起見，圖書館館員們編制了索引目錄卡。
During the 1920s Fisher became rich from the invention and sale of a card-index system. He used the money to buy stocks on margin, and by 1929 was worth $10m.
19世紀20年代費雪因爲發明竝出售一種卡片索引系統而變得富有。

The index tracks credit-card purchases of diesel fuel at truckstops across the country and provides a real-time indication of how much freight is moving from ports and factories to consumers.
FORBES: Truckers Say Market's Wrong, Economy Grows
As the Fiscal Cliff debate diffuses into so many Three-Card Monte games during 2013, perhaps the clarity of the Government Affordability Index can prevent us from being tricked, over and over and over again.
FORBES: We Need To Reign In The Government Affordability Index

A card index is a number of cards with information written on them which are arranged in a particular order, usually alphabetical, so that you can find the information you want easily.