The Chinese Optical Abstracts (COA) is a practical computer information retrieval systems. It contained 23

000 records which included title

author sourse

classification

subject words etc.It has been established by MICROCDS/ ISIS software on the AST/P286 computer.Users may find every document by 12 entrances

also may realize input and output through ISO-2709 standard data format.Systems are operated by menu. COA's contents

functions

data structure

and programs structure are described and discussed followed by retrieval methods.