-* If you're already a programmer and you're in more of a hurry, you could instead look at the [Quick Introduction to Racket](http://docs.racket-lang.org/quick/index.html). This tutorial provides a brief introduction to the Racket programming language by using DrRacket and one of Racket's picture-drawing libraries.
-
-* [An Introduction to Lambda Calculus and Scheme](http://www.jetcafe.org/~jim/lambda.html) is also aimed at programmers.
-
-* After any of the preceding, you could move on to [Racket Guide](http://docs.racket-lang.org/guide/index.html). This starts with a tutorial on Racket basics; then it describes the rest of the Racket language. This guide is intended for programmers who are new to Racket or new to some part of Racket. It assumes programming experience, so if you are new to programming, you should instead start with one of the textbooks listed above. This Guide describes parts of the Racket language which go beyond the learning-oriented fragments of How to Design Programs.
-
-* The [Complete Racket Reference Manual](http://docs.racket-lang.org/reference/index.html) defines the core Racket language and describes its most prominent libraries. The Racket Guide is friendlier; though less precise and less complete.
-
-* The Scheme language is standardized; the various implementations of the
-language usually adhere to what's published in the current standard and add on
-different handy extensions. The first standard was published in 1975. A
-revision was published in 1978 called "The revised report on Scheme, a
-dialect of Lisp." Thereafter, revisions of the standard were titled "The
-Revised Revised Report..." and so on, or "The Revised^n Report..." for
-short, for increasing n. The most widely implemented standard is [The
-Revised^5 Report on Scheme](http://docs.racket-lang.org/r5rs/index.html),
-or R5RS, published in 1998.
-\[ [Alt link](http://www.schemers.org/Documents/Standards/R5RS/HTML/) \]
-A new standard [R6RS](http://docs.racket-lang.org/r6rs/index.html) was ratified
-in 2007, but this has many detractors and has not been fully accepted in the
-community.
-\[ [Alt link](http://www.r6rs.org/final/html/r6rs/r6rs.html);
-[Libraries](http://www.r6rs.org/final/html/r6rs-lib/r6rs-lib.html) \]