PHP (Hypertext Preprocessor) is a widely used, open-source, server-side scripting language primarily designed for web development, allowing developers to create dynamic and interactive web pages. 

.NET Core (now simply .NET) is a cross-platform, open-source framework for building modern, cloud-enabled applications that runs on Windows, Linux, and macOS, offering a modular and performant alternative to the older .NET Framework

Angular is a powerful, open-source, and comprehensive web application framework developed by Google, primarily used for building single-page applications (SPAs) and dynamic web interfaces, leveraging TypeScript for a robust and scalable development experience. 

React is a JavaScript library, primarily used for building user interfaces, that allows developers to create interactive and reusable components for web and mobile applications. 

Node.js is a cross-platform, open-source JavaScript runtime environment that allows developers to build server-side and network applications using JavaScript.

MySQL is an open-source Relational Database Management System (RDBMS) that uses SQL (Structured Query Language) to manage and store data, widely used for various applications, from small projects to large websites and enterprise solutions. 

MS SQL Server is a Relational database management system (RDBMS) that's designed for the enterprise environment. SQL Server runs on T-SQL (Transact -SQL, a set of programming extensions from Sybase and Microsoft that add several features to standard SQL, including transaction control, exception and error handling, row processing, and declared variables.