What are IaaS, PaaS, SaaS, and what are public, private, and hybrid clouds?

IaaS (Infrastructure as a Service): infrastructure as a service

PAAS (Platform-as-a-Service): platform as a service, a business model that regards the operation and development environment of application services as a service.

SaaS (Software-as-a-Service): software as a service, a method of selling software that allows customers to access software services through thin clients (browsers), ERP, HRM, etc.

Public cloud: usually refers to the usable cloud provided by third-party providers for users. Public cloud can generally be used through Internet, which may be free or low-cost. The core attribute of public cloud is shared resource service.

Private cloud: built for a customer to use alone, thus providing the most effective control over data, security, and quality of service. The company has the infrastructure and can control how applications are deployed on this infrastructure. Private clouds can be deployed in the firewall of the enterprise data center or in a secure hosting location. The core attribute of the private cloud is proprietary resources.

Hybrid cloud: both public and private clouds

Specifically, it has https://platform.neusoft.com/ on it.