While mathematical software packages are commercially successful and widely used, the use of formal methods in hardware and software development is also becoming more and more important and necessary. This has made deduction systems indispensable because of the complexity and sheer size of the reasoning tasks involved. This volume is devoted to the integration of computer algebra systems and deduction systems and the results presented will improve the automated design of hardware and software systems. The articles in this collection, presented at the 8th Symposium on the Integration of Symbolic Computation and Mechanized Reasoning, held August 6--7 in St. Andrews, Scotland, address all aspects relating deduction and computer algebra systems.