(a) Card Index: It consists of a number of cards of a standard size, each concerned with one item of index. The heading is written on the top edge of the card and the remaining space is used to indicating the place where the corresponding record is kept. This lower portion of the card also carries certain essential information.

(b) Loose Leaf Index: In this type of index, the pages on which the index is prepared are not bound. Here the pages are fitted on to a metal hinges and screwed. Thus, wherever required some pages can be taken out and/or additional pages can be inserted.

(c) Bound Book Index: In this form of index, a bound book or a register is divided into various sections. Each section is allotted an alphabet. Names of the parties and the persons starting from a particular alphabet are written in the concerned section. At the outer margin of the page letter groups are shown by cut outs so that the initial letters of all the sections are visible at a glance. All entries relating to a particular letter of the alphabet are arranged in the same section or pages reserved for the same letter of the alphabet in a strict alphabetical order.