Harvard's free programming classes teach you how to think, debug, and adapt in an AI-driven world where knowing code matters more than ever.

What our readers found particularly interesting: The Top 10 News of 2025 were dominated by security, open source, TypeScript, ...

APPL is A Prompt Programming Language that extends Python to provide a Natural, Intuitive, Convenient, and Efficient (NICE) way to utilize Large Language Models (LLMs) such as GPT in your program. We ...

The new major version with a new JIT compiler, a revised parallelization API, and a maturing type system paves the way for ...

PDL is a declarative language designed for developers to create reliable, composable LLM prompts and integrate them into software systems. It provides a structured way to specify prompt templates, ...