Here are the best online courses and resources to learn Lisp and its most popular dialects: Common Lisp, Scheme, Racket, and Emacs Lisp.

TL;DR Duolingo is targeting 100 million DAUs by 2028. It took the company 13 years to get its first 50 million DAUs. The new strategy includes more AI features for free users, deeper language courses, and growth of Chess, Math, and Music. But the strategy sacrifices short-term growth for long-term results, and von Ahn is calling 2026 its investment year without significant results.   It took Duolingo 13 years to get 50 million DAUs. CEO Luis von Ahn wants to double it in three years. For yea

The new courses cover cybersecurity and SQL, and both offer a free certificate of completion.

Two years after its first major layoff round, Coursera announces another, impacting 10% of its workforce.