Comparison of Information Retrieval Capabilities in Library Software of Payam, Voyager and Aleph

Aim: The purpose of this study was comparing Information Retrieval Capabilities in Web-based Library Software of Payam, with Voyager and ALEPH. Methodology: A checklist designed and included six main trait for evaluation and comparing ۷۳ scales. Data collected by experts' observing of the software's OPAC. Data analyzed by the descriptive statistics methods. Findings: Findings shows the preferences in search capabilities in species of fields the Aleph with ۹۷% is the most and Payam with ۹۳.۴۵% is the least, in search formula Aleph and Voyager with ۱۰۰% has the most and Payam with ۵۸.۳۳% is the least, in possibility of species of searches Voyager with ۸۳.۹% is the most and Aleph with ۷۸.۷۳% is the least, in display of results Aleph with ۹۶.۳۶% is the most and Payam with ۷۸.۱۸% is the least, in help all of software with ۹۲.۸۵% are equal, and in web ۲ capabilities Aleph with ۸۰% is the most and Payam with ۰% has the least preferences. Results: The results show that Aleph with ۹۱.۳۰ percent is in first grade, Voyager with ۸۷.۲۴ percent is in the second grade and Payam with ۷۵.۵۰ percent is in the third grade. Payam has the least preferences of evaluation than the two other software.