
1) Computing platform
Found on
https://www.crosswordclues.com/clue/runtime-system

A run-time system, also called runtime system, or just runtime, exhibits the behavior of the constructs of a computer language. Every programming language has {Verify source|date=December 2012} some form of a runtime system, whether the language is a compiled language, interpreted language, embedded domain-specific language, or is invoked via an A...
Found on
http://en.wikipedia.org/wiki/Runtime_system
No exact match found.