ISRO uses C and C++ for various software and applications, such as on-board systems, satellite control systems, and ground-based applications. 

ISRO has several applications for which it uses Java, such as web applications, ground-based applications, and android-based systems. 

It is a general-purpose programming language, used by ISRO for its simplicity. It is used in several tasks, such as data analysis, machine learning, scripting, and automation. 

Fortran is a high-computing language designed for scientific purposes. It is used by ISRO for tasks, such as computational fluid dynamics, numerical simulation, and data analysis. 

ISRO uses Ruby for its ground-control systems and monitoring software. It is a simple programming language that is specially designed for automation tools and web development. 

MATLAB is a language for complex mathematical modeling and simulations. ISRO uses it for data analysis, designing, and testing spacecraft systems.