reference

Find the package that contains a command. Covers major Linux distributions and macOS.

Search multiple dictionaries at once. Reverse dictionary, thesaurus, and pattern matching.

Authoritative, peer-reviewed philosophy reference. The definitive resource for philosophy.

Encyclopedic physics reference. Concept maps connecting physics topics.

Organic chemistry resources. Reactions, mechanisms, and synthesis.

Complete basketball statistics. Every player, every game, every stat.

Complete NFL statistics database. Historical and current stats.

Soccer/football statistics. Comprehensive data from leagues worldwide.

Comprehensive mathematics encyclopedia. Definitions, theorems, and explanations for every math concept.

Quick reference guides for programming languages. Learn the syntax of a new language in one page.

Paste a command line and get a breakdown of every argument. Essential for understanding complex shell commands.