Parsweb is an on- line real time system which changes update the database immediately. It makes possible to search information of one library or more than one center through the internet. In other words the queries could be send to one or many servers which are located in different places. Parsweb has an interface with image, text, self-check systems. It can be used in three languages as Persian, English and Arabic. Parsweb allows the user to access the OPAC module in Graphic user interface under Windows NT, Windows XP, WINDOWS 2000 or using WWW browser Explorer, Opera and …. The OPAC function is accessible to all users of parsweb, and needs no password for access. For More information visit Document center and download the brochure.