diff --git a/extra/assoc-heaps/assoc-heaps-docs.factor b/extra/assoc-heaps/assoc-heaps-docs.factor
deleted file mode 100644
index 475b337cf3..0000000000
--- a/extra/assoc-heaps/assoc-heaps-docs.factor
+++ /dev/null
@@ -1,34 +0,0 @@
-! Copyright (C) 2008 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: help.markup help.syntax io.streams.string assocs
-heaps.private ;
-IN: assoc-heaps
-
-HELP: <assoc-heap>
-{ $values { "assoc" assoc } { "heap" heap } { "assoc-heap" assoc-heap } }
-{ $description "Constructs a new " { $link assoc-heap } " from two existing data structures." } ;
-
-HELP: <unique-max-heap>
-{ $values { "unique-heap" assoc-heap } }
-{ $description "Creates a new " { $link assoc-heap } " where the assoc is a hashtable and the heap is a max-heap. Popping an element from the heap leaves this element in the hashtable to ensure that the element will not be processed again." } ;
-
-HELP: <unique-min-heap>
-{ $values { "unique-heap" assoc-heap } }
-{ $description "Creates a new " { $link assoc-heap } " where the assoc is a hashtable and the heap is a min-heap. Popping an element from the heap leaves this element in the hashtable to ensure that the element will not be processed again." } ;
-
-{ <unique-max-heap> <unique-min-heap> } related-words
-
-HELP: assoc-heap
-{ $description "A data structure containing an assoc and a heap to get certain properties with better time constraints at the expense of more space and complexity. For instance, a hashtable and a heap can be combined into one assoc-heap to get a sorted data structure with O(1) lookup. Operations on assoc-heap may update both the assoc and the heap or leave them out of sync if it's advantageous." } ;
-
-ARTICLE: "assoc-heaps" "Associative heaps"
-"The " { $vocab-link "assoc-heaps" } " vocabulary combines exists to synthesize data structures with better time properties than either of the two component data structures alone." $nl
-"Associative heap constructor:"
-{ $subsections <assoc-heap> }
-"Unique heaps:"
-{ $subsections
-    <unique-min-heap>
-    <unique-max-heap>
-} ;
-
-ABOUT: "assoc-heaps"
diff --git a/extra/assoc-heaps/assoc-heaps-tests.factor b/extra/assoc-heaps/assoc-heaps-tests.factor
deleted file mode 100644
index 22f70d5e5d..0000000000
--- a/extra/assoc-heaps/assoc-heaps-tests.factor
+++ /dev/null
@@ -1,11 +0,0 @@
-! Copyright (C) 2008 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: assoc-heaps combinators heaps kernel tools.test ;
-
-{ { { 0 "zero" } { 1 "one" } { 2 "two" } } } [
-    <unique-min-heap>
-    "two" 2 pick heap-push
-    "zero" 0 pick heap-push
-    "one" 1 pick heap-push
-    heap-pop-all
-] unit-test
diff --git a/extra/assoc-heaps/assoc-heaps.factor b/extra/assoc-heaps/assoc-heaps.factor
deleted file mode 100644
index af3fdfc325..0000000000
--- a/extra/assoc-heaps/assoc-heaps.factor
+++ /dev/null
@@ -1,29 +0,0 @@
-! Copyright (C) 2008 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors assocs hashtables heaps kernel ;
-IN: assoc-heaps
-
-TUPLE: assoc-heap assoc heap ;
-
-C: <assoc-heap> assoc-heap
-
-: <unique-min-heap> ( -- unique-heap )
-    H{ } clone <min-heap> <assoc-heap> ;
-
-: <unique-max-heap> ( -- unique-heap )
-    H{ } clone <max-heap> <assoc-heap> ;
-
-M: assoc-heap heap-push*
-    pick over assoc>> key? [
-        3drop f
-    ] [
-        [ assoc>> swapd set-at ] [ heap>> heap-push* ] 3bi
-    ] if ;
-
-M: assoc-heap heap-pop heap>> heap-pop ;
-
-M: assoc-heap heap-peek heap>> heap-peek ;
-
-M: assoc-heap heap-empty? heap>> heap-empty? ;
-
-M: assoc-heap heap-size heap>> heap-size ;
diff --git a/extra/assoc-heaps/authors.txt b/extra/assoc-heaps/authors.txt
deleted file mode 100644
index 7c1b2f2279..0000000000
--- a/extra/assoc-heaps/authors.txt
+++ /dev/null
@@ -1 +0,0 @@
-Doug Coleman
diff --git a/extra/assoc-heaps/summary.txt b/extra/assoc-heaps/summary.txt
deleted file mode 100644
index 792be0a9ec..0000000000
--- a/extra/assoc-heaps/summary.txt
+++ /dev/null
@@ -1 +0,0 @@
-Priority queue with fast insertion, removal of first element, and lookup of arbitrary elements by key
diff --git a/extra/assoc-heaps/tags.txt b/extra/assoc-heaps/tags.txt
deleted file mode 100644
index 42d711b32b..0000000000
--- a/extra/assoc-heaps/tags.txt
+++ /dev/null
@@ -1 +0,0 @@
-collections