The Volume I of this double-volume book contains fourteen high quality book chapters in three different parts. Part 1 is on and it presents four chapters. Part 2 is on contains four more book chapters. The Part 3 of this volume is on and it includes as many as six chapters. Volume II of the book has three Parts presenting a total of eleven chapters in it. Part 4 consists of five excellent chapters on ranging from cloud service design to transactional memory. Part 5 in Volume II is on with two book chapters in it. Part 6 of this volume is on with four chapters in it. We strongly believe that the twenty five chapters in these two volumes of Applied Computation and Security Systems will be appreciated by all its readers.