CLI ↔ Text-based UI to provide cmd Statements to Terminal
node ↔ start REPL Terminal for Node.js
Next CLI ↔ Next.js CLI Dev tool to start/build/test project from Terminal
Firebase CLI ↔ firebase-tools CLI Dev tool to manage Firebase from Terminal - run as .exe or npm -g Machine Code
cURL ↔ CLI Dev tool to get/send data over network from Terminal
REPL ↔ CLI to interact with Compiler via Terminal with output to loop results
Working Dir ↔ current dir in file explorer/Terminal
yarn test --watchAll ↔ to run Jest Test Runner in Terminal