runtime library
set of routines that can be invoked by a compiled software binary during its execution
MIT/GNU Scheme
a Scheme implementation with integrated editor and debugger
Open Design Alliance
nonprofit organization creating SDKs for engineering applications
GNU Portable Threads
thread library
Tokio
asynchronous runtime for the Rust programming language
Free Pascal Runtime Library
Runtime library for Free Pascal
GNU C Library
GNU Project's implementation of the C standard library