This book constitutes the refereed proceedings of the 32nd International Symposium on Computer and Information Sciences, ISCIS 2018, held in Poznan, Poland, in September 2018.The 29 revised full papers presented were carefully reviewed and selected from 64 submissions. The papers are dealing with the following topics: smart algorithms; data classification and processing; stochastic modelling; performance evaluation; queuing systems; wireless networks and security; image processing and computer vision.