Serikbayeva, S., Tussupov, J.A., Sambetbayeva, M.A., Yerimbetova, A., Borankulova, G. and Tungatarova, A. 2022. A MODEL OF A DISTRIBUTED INFORMATION SYSTEM BASED ON THE Z39.50 PROTOCOL. International Journal of Communication Networks and Information Security (IJCNIS). 13, 3 (Apr. 2022). DOI:https://doi.org/10.17762/ijcnis.v13i3.5122.