diff --git a/basis/game/input/xinput/xinput.factor b/basis/game/input/xinput/xinput.factor
index bce908edc8..c51ec1e098 100644
--- a/basis/game/input/xinput/xinput.factor
+++ b/basis/game/input/xinput/xinput.factor
@@ -1,4 +1,4 @@
-USING: assocs game.input math math.order kernel macros fry sequences quotations
+USING: game.input math math.order kernel macros fry sequences quotations
 arrays windows.directx.xinput combinators accessors windows.types
 game.input.dinput sequences.private namespaces classes.struct
 windows.errors windows.com.syntax alien.strings ;
diff --git a/basis/interpolate/interpolate.factor b/basis/interpolate/interpolate.factor
index 8a0b437970..bed5b7416c 100644
--- a/basis/interpolate/interpolate.factor
+++ b/basis/interpolate/interpolate.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008, 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs fry hashtables io kernel macros make
+USING: accessors arrays fry hashtables io kernel macros make
 math.parser multiline namespaces present sequences
 sequences.generalizations splitting strings vocabs.parser ;
 IN: interpolate
diff --git a/extra/classes/struct/vectored/vectored.factor b/extra/classes/struct/vectored/vectored.factor
index fff479b798..53f9fce988 100644
--- a/extra/classes/struct/vectored/vectored.factor
+++ b/extra/classes/struct/vectored/vectored.factor
@@ -1,5 +1,5 @@
 ! (c)2009 Joe Groff bsd license
-USING: accessors assocs classes.struct classes.tuple combinators fry
+USING: accessors classes.struct classes.tuple combinators fry
 functors kernel locals macros math parser quotations sequences
 sequences.private slots specialized-arrays words ;
 IN: classes.struct.vectored
diff --git a/extra/cuda/demos/hello-world/hello-world.factor b/extra/cuda/demos/hello-world/hello-world.factor
index 68c3064be1..8a7adb7b4d 100644
--- a/extra/cuda/demos/hello-world/hello-world.factor
+++ b/extra/cuda/demos/hello-world/hello-world.factor
@@ -3,7 +3,7 @@
 USING: accessors alien.c-types alien.strings byte-arrays cuda
 cuda.contexts cuda.devices cuda.libraries cuda.memory cuda.syntax
 destructors io io.encodings.string io.encodings.utf8 kernel locals
-math math.parser namespaces sequences strings assocs ;
+math math.parser namespaces sequences strings ;
 IN: cuda.demos.hello-world
 
 CUDA-LIBRARY: hello cuda32 vocab:cuda/demos/hello-world/hello.ptx
diff --git a/extra/math/matrices/laplace/laplace.factor b/extra/math/matrices/laplace/laplace.factor
index dcc6f39a1a..817fa89d9a 100644
--- a/extra/math/matrices/laplace/laplace.factor
+++ b/extra/math/matrices/laplace/laplace.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2013 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs fry kernel locals math math.matrices
+USING: accessors arrays fry kernel locals math math.matrices
 math.vectors sequences sequences.private ;
 IN: math.matrices.laplace
 
diff --git a/extra/math/transforms/fft/fft.factor b/extra/math/transforms/fft/fft.factor
index 3c76051c99..b887b55a53 100644
--- a/extra/math/transforms/fft/fft.factor
+++ b/extra/math/transforms/fft/fft.factor
@@ -1,6 +1,6 @@
 ! Copyright (c) 2012 John Benediktsson
 ! See http://factorcode.org/license.txt for BSD license.
-USING: arrays assocs kernel locals math math.constants math.functions
+USING: arrays kernel locals math math.constants math.functions
 math.vectors sequences sequences.extras sequences.private ;
 IN: math.transforms.fft
 
diff --git a/extra/project-euler/022/022.factor b/extra/project-euler/022/022.factor
index a20d568c7b..fa498d8499 100644
--- a/extra/project-euler/022/022.factor
+++ b/extra/project-euler/022/022.factor
@@ -1,6 +1,6 @@
 ! Copyright (c) 2007 Aaron Schaefer.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: ascii assocs io.encodings.ascii io.files kernel math
+USING: ascii io.encodings.ascii io.files kernel math
 project-euler.common sequences sorting splitting ;
 IN: project-euler.022
 
diff --git a/extra/rosetta-code/bitmap/bitmap.factor b/extra/rosetta-code/bitmap/bitmap.factor
index 114249ca38..3cac8cba12 100644
--- a/extra/rosetta-code/bitmap/bitmap.factor
+++ b/extra/rosetta-code/bitmap/bitmap.factor
@@ -1,6 +1,6 @@
 ! Copyright (c) 2012 Anonymous
 ! See http://factorcode.org/license.txt for BSD license.
-USING: arrays assocs fry kernel math.matrices sequences ;
+USING: arrays fry kernel math.matrices sequences ;
 IN: rosetta-code.bitmap
 
 ! http://rosettacode.org/wiki/Basic_bitmap_storage
diff --git a/unmaintained/adsoda/combinators/combinators.factor b/unmaintained/adsoda/combinators/combinators.factor
index 8b0ceca0ab..52a5b83c51 100644
--- a/unmaintained/adsoda/combinators/combinators.factor
+++ b/unmaintained/adsoda/combinators/combinators.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Jeff Bigot
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel arrays assocs sequences fry math combinators ;
+USING: kernel arrays sequences fry math combinators ;
 
 IN: adsoda.combinators