This book consists of two titles, which are the following:

1 - Computer Science: Computer science is a field that deals with the study of computers and computational systems. It encompasses both the theoretical and practical aspects of computing, including algorithms, data structures, programming languages, software engineering, and more. It's about understanding how computers work, how they can solve problems, and how they interact with humans and other systems.

2 - Cyber Security: To effectively defend against the threats, cybersecurity professionals employ a variety of strategies and technologies. This includes implementing robust firewalls and intrusion detection systems to monitor and control network traffic, deploying antivirus software to detect and remove malicious software, using encryption to secure sensitive data both in transit and at rest, and implementing strong authentication mechanisms such as multi-factor authentication to prevent unauthorized access.