This resource is written for the current A2 Level CCEA Digital Technology specification and designed to compliment the existing AS Level textbook. It is fully up-to-date with recent developments in AI and other front line technology and systematically covers unit A2 1: Information Systems. It is illustrated with diagrams and photographs and includes tasks and exercises, examples and case studies. Answers to all the exercises in the book are available at the following link: http://colourpointeducational.com/media/content/DigitalTechnologyA2Answers.pdf   Contents: • Unit A2 1: Information Systems  1: Networks 2: Protocols 3: Transmission Media 4: Error Correction and Detection 5: Relational Databases 6: Optimising Databases 7: Using Databases 8: Artificial Intelligence 9: Expert Systems 10: Natural Language and Voice Recognition 11: Robotics 12: Mobile Technologies 13: Data Mining 14: Cloud Computing 15: Individual, Social, and Legal Considerations 16: Ethical Considerations