Simulating an API for development or testing.

Pattern restricting a class to one shared instance.

Compiler converting source code between programming languages.

Coordinating multiple API calls into a workflow.

Human-readable code written by programmers.

Explicit conversion between compatible data types.

Intermediate service forwarding API requests.

Data structure using last-in-first-out ordering.

Test targeting a small isolated software unit.

Testing API behavior, reliability, and correctness.