# program.org

> Program is a reactive programming language where values recompute themselves. You declare values in terms of other values; the runtime tracks every dependency and keeps the whole program current when something changes. The same reactive model drives data, effects, context and the user interface.

## Pages

- [Home](https://program.org/): What Program is and why reactivity is the runtime's job.
- [Language](https://program.org/language/): What makes Program different (effortless async, batteries included, animation and graphics, composability, a small definition, polyglot output), plus the route into commands, examples, roadmap and modules.
- [Modules](https://program.org/modules/): The full module library, grouped into four categories.
- [Get](https://program.org/get/): Try Program online in the browser (coming soon); the "Get Program" section also holds [Download](https://program.org/download/) for the local toolchain (coming soon).

## Language

- [Keywords](https://program.org/language/keywords/): The whole keyword set, each with an example and its own page: [MODULE](https://program.org/language/phase-one/module/), [FUNCTION](https://program.org/language/phase-one/function/), [NATIVE](https://program.org/language/phase-one/native/), [TYPE](https://program.org/language/phase-one/type/), [INPUT](https://program.org/language/phase-one/input/), [HOLE](https://program.org/language/phase-one/hole/), [LET](https://program.org/language/phase-one/let/), [STATE](https://program.org/language/phase-one/state/), [REVERSE](https://program.org/language/phase-one/reverse/) (which covers SET).
- [Examples](https://program.org/language/examples/): Complete Program programs: hello world, add two numbers, a reactive counter, an HTTP request and an animated value.
- [Features](https://program.org/language/features/): The ideas behind Program: [Reactive](https://program.org/language/features/reactive/), [Reversible](https://program.org/language/features/reversible/), [Composable](https://program.org/language/features/composable/), [Asynchronous](https://program.org/language/features/asynchronous/), [Sandboxed](https://program.org/language/features/sandboxed/), [Polyglot](https://program.org/language/features/polyglot/) and [Typesafe](https://program.org/language/features/typesafe/).
- [Targets](https://program.org/language/targets/): How Program renders to each language, each shown with the same counter program and its generated code: [JavaScript](https://program.org/language/targets/javascript/), [TypeScript](https://program.org/language/targets/typescript/), [Dart](https://program.org/language/targets/dart/), [Swift](https://program.org/language/targets/swift/), [Go](https://program.org/language/targets/go/), [Rust](https://program.org/language/targets/rust/), [Zig](https://program.org/language/targets/zig/) and the canonical [JSON](https://program.org/language/targets/json/) command form (a GLSL shader target also exists).
- [Roadmap](https://program.org/language/roadmap/): The three-phase plan: where the language is now and where it is going.

## Modules (by category)

The standard library, grouped into four categories. Each module has its own page at /module/<Name>/.

- [Core](https://program.org/modules/phase-one/core/): Logic, numbers, console and context.
- [Data](https://program.org/modules/phase-one/data/): Values, structures and formats.
- [Interface](https://program.org/modules/phase-one/interface/): The user interface, colour, animation and graphics.
- [Connectivity](https://program.org/modules/phase-one/connectivity/): Networking, location and storage.

## Blog

- [An Introduction](https://program.org/blog/an-introduction/): Coming soon.
- [Mission Possible](https://program.org/blog/mission-possible/): Coming soon.
- [The Key To Reactivity](https://program.org/blog/the-key-to-reactivity/): Coming soon.
- [Spooky Reaction At A Distance](https://program.org/blog/spooky-reaction-at-a-distance/): Coming soon.
- [Descending Mount Effect](https://program.org/blog/descending-mount-effect/): Coming soon.
- [Let That Async In](https://program.org/blog/let-that-async-in/): Coming soon.
- [Cross Cutting Concerned](https://program.org/blog/cross-cutting-concerned/): Coming soon.
- [JSON And The Algorithms](https://program.org/blog/json-and-the-algorithms/): Coming soon.
- [Not My Final Format](https://program.org/blog/not-my-final-format/): Coming soon.