The main purpose of applications is to provide solutions to real-world customer requirements. Generally, it uses various modern technologies such as cryptography, artificial intelligence, machine learning, blockchain, and cloud services. In many cases, these applications are a suite of microservices to provide scalability along with performance.
Management Console is a web development stack using REST API for configuring and monitoring the system. It typically includes a JavaScript front-end, a web server, and a middleware component.
The layer that implements the business logic and interfaces with the database is called Middleware. This layer can be implemented in multiple technologies and languages, like Python, C++, .NET, Java, PHP, etc.
The Operating System layer includes a kernel and device drivers. This layer is OS and hardware dependent, and typically more difficult to implement. It has a large learning curve as well. The development requires an in-depth understanding of various OS sub-systems, kernel API, interrupt handling, OS scheduling, memory, and process management.