X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=92116551b5d7045279f03412366a4d7f85b6cc74;hp=5299e29780b16c4b94f0ee16ef4ce45d6d2d90e1;hb=09627025337649a4b20af62151d62fd0211c2e38;hpb=8f24b96ab01127d54b9efefff669c89b2d03a135

diff --git a/week1.mdwn b/week1.mdwn
index 5299e297..92116551 100644
--- a/week1.mdwn
+++ b/week1.mdwn
@@ -14,6 +14,7 @@ See also:
 
 *	[Chris Barker's Lambda Tutorial](http://homepages.nyu.edu/~cb125/Lambda)
 *	[Lambda Animator](http://thyer.name/lambda-animator/)
+*	[Penn lambda calculator](http://www.ling.upenn.edu/lambda/) Pedagogical software developed by Lucas Champollion, Josh Tauberer and Maribel Romero.  Linguistically oriented. 
 *	MORE
 
 The lambda calculus we'll be focusing on for the first part of the course has no types. (Some prefer to say it instead has a single type---but if you say that, you have to say that functions from this type to this type also belong to this type. Which is weird.)
@@ -312,7 +313,7 @@ Finally, you'll see the term **dynamic** used in a variety of ways in the litera
 
 *	dynamic versus static typing
 
-*	dynamic versus lexical scoping
+*	dynamic versus lexical [[!wikipedia Scope (programming) desc="scoping"]]
 
 *	dynamic versus static control operators
 
@@ -327,7 +328,7 @@ To read further about the relation between declarative or functional programming
 *	[[!wikipedia Purely functional]]
 *	[[!wikipedia Referential transparency (computer science)]]
 *	[[!wikipedia Imperative programming]]
-
+*	[[!wikipedia Side effect (computer science) desc="Side effects"]]
 
 
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