► |  | The Racket Guide

1 | Welcome to Racket
2 | Racket Essentials
3 | Built-In Datatypes
4 | Expressions and Definitions
5 | Programmer-Defined Datatypes
6 | Modules
7 | Contracts
8 | Input and Output
9 | Regular Expressions
10 | Exceptions and Control
11 | Iterations and Comprehensions
12 | Pattern Matching
13 | Classes and Objects
14 | Units
15 | Reflection and Dynamic Evaluation
16 | Macros
17 | Creating Languages
18 | Concurrency and Synchronization
19 | Performance
20 | Parallelism
21 | Running and Creating Executables
22 | More Libraries
23 | Dialects of Racket and Scheme
24 | Command-Line Tools and Your Editor of Choice
| Bibliography
| Index

▼ | 23 | Dialects of Racket and Scheme

23.1 | More Rackets
23.2 | Standards
23.3 | Teaching

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### 23`` Dialects of Racket and Scheme

We use “Racket” to refer to a specific dialect of the Lisp language, and one that is based on the Scheme branch of the Lisp family. Despite Racket’s similarity to Scheme, the #lang prefix on modules is a particular feature of Racket, and programs that start with #lang are unlikely to run in other implementations of Scheme. At the same time, programs that do not start with #lang do not work with the default mode of most Racket tools.

“Racket” is not, however, the only dialect of Lisp that is supported by Racket tools. On the contrary, Racket tools are designed to support multiple dialects of Lisp and even multiple languages, which allows the Racket tool suite to serve multiple communities. Racket also gives programmers and researchers the tools they need to explore and create new languages.

23.1 More Rackets
23.2 Standards
23.2.1 R5RS
23.2.2 R6RS
23.3 Teaching

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