SQL Server is a database server by Microsoft. The Microsoft relational database management system is a software product which primarily stores and retrieves data requested by other applications.
Python was developed by Guido van Rossum in the late eighties and early nineties at the National Research Institute for Mathematics and Computer Science in the Netherlands.
Android is a Linux based operating system it is designed primarily for touch screens mobile devices such as smartphones and tablet computers.
Arduino is a platform for micro-controller devices that makes embedded programming much easier than traditional methods.