Trade Catalogues 

Publishers and booksellers produce catalogues periodically and send them to libraries as a routine sales promotion activity. These catalogues may be either in printed form or in the form of mimeographed sheets. They generally contain the latest publications of the publishers. The catalogues of booksellers, however, contain publications of different publishers - old and new available with them.

These catalogues are also cumulated at periodical intervals, to aid libraries in their selection of books. These catalogues comprise entries arranged in an alphabetical order of authors and titles, under broad subject groups and are not expected to meet the different approaches of users, as a library catalogue is expected to do. They are mainly used by libraries as sources for their collection building activity. Professional associations and institutions also bring out catalogues periodically, mostly selective, on different subject groups, to aid libraries in their book selection activity. 

These catalogues are obviously different from library catalogues, though they carry bibliographical data of documents. They inform the readers about new books published but do not tell where (in which libraries) these can be found. 

Examples: 

Friend's Publications (India) New Delhi. Book list of own publications, 1994-1995.

McGraw Hill International Editions, 1994. ' Orient Longman College Catalogue, 1995. 

Concept Publishing Company, New Delhi. Subject List, 1996. 

Catalogue of IGNOU Course Material (Print, Audio- and Video), 1994.