CentOS vs Kali Linux: What are the differences?
Developers describe CentOS as "The Community ENTerprise Operating System". The CentOS Project is a community-driven free software effort focused on delivering a robust open source ecosystem. For users, we offer a consistent manageable platform that suits a wide variety of deployments. For open source communities, we offer a solid, predictable base to build upon, along with extensive resources to build, test, release, and maintain their code. On the other hand, Kali Linux is detailed as "Penetration Testing and Ethical Hacking Linux Distribution". It is a Debian-based Linux distribution aimed at advanced Penetration Testing and Security Auditing. It contains several hundred tools which are geared towards various information security tasks, such as Penetration Testing, Security research, Computer Forensics and Reverse Engineering.
CentOS and Kali Linux can be primarily classified as "Operating Systems" tools.