diff --git a/extra/benchmark/base64/base64.factor b/extra/benchmark/base64/base64.factor
index 350a29f865..95202f35f9 100644
--- a/extra/benchmark/base64/base64.factor
+++ b/extra/benchmark/base64/base64.factor
@@ -4,7 +4,7 @@ USING: math sequences kernel base64 ;
 IN: benchmark.base64
 
 : base64-benchmark ( -- )
-    65535 [ 255 bitand ] "" map-as
+    65535 iota [ 255 bitand ] "" map-as
     20 [ >base64 base64> ] times
     drop ;
 
diff --git a/extra/benchmark/dawes/dawes.factor b/extra/benchmark/dawes/dawes.factor
index 31c202b803..839bd89dc0 100644
--- a/extra/benchmark/dawes/dawes.factor
+++ b/extra/benchmark/dawes/dawes.factor
@@ -8,7 +8,7 @@ IN: benchmark.dawes
 : count-ones ( int-array -- n ) [ 1 = ] count ; inline
 
 : make-int-array ( -- int-array )
-    120000 [ 255 bitand ] int-array{ } map-as ; inline
+    120000 iota [ 255 bitand ] int-array{ } map-as ; inline
 
 : dawes-benchmark ( -- )
     200 make-int-array '[ _ count-ones ] replicate drop ;
diff --git a/extra/benchmark/dispatch2/dispatch2.factor b/extra/benchmark/dispatch2/dispatch2.factor
index 87848cee9d..7db583d42a 100644
--- a/extra/benchmark/dispatch2/dispatch2.factor
+++ b/extra/benchmark/dispatch2/dispatch2.factor
@@ -5,8 +5,8 @@ IN: benchmark.dispatch2
 
 : sequences ( -- seq )
     [
-        1 ,
-        10 >bignum ,
+        1 iota ,
+        10 >bignum iota ,
         { 1 2 3 } ,
         "hello world" ,
         SBUF" sbuf world" ,
@@ -14,7 +14,7 @@ IN: benchmark.dispatch2
         double-array{ 1.0 2.0 3.0 } ,
         "hello world" 4 tail-slice ,
         10 f <repetition> ,
-        100 2 <sliced-groups> ,
+        100 iota 2 <sliced-groups> ,
         "hello" <reversed> ,
         { { 1 2 } { 3 4 } } 0 <column> ,
         ?{ t f t } ,
diff --git a/extra/benchmark/dispatch4/dispatch4.factor b/extra/benchmark/dispatch4/dispatch4.factor
index 2f989b7723..685c92a8cc 100644
--- a/extra/benchmark/dispatch4/dispatch4.factor
+++ b/extra/benchmark/dispatch4/dispatch4.factor
@@ -54,14 +54,14 @@ IN: benchmark.dispatch4
     20000000 [
         20 [
             foobar-1 drop
-        ] each
+        ] each-integer
     ] times ;
 
 : foobar-test-2 ( -- )
     20000000 [
         20 [
             foobar-2 drop
-        ] each
+        ] each-integer
     ] times ;
 
 MAIN: foobar-test-1
diff --git a/extra/benchmark/e-decimals/e-decimals.factor b/extra/benchmark/e-decimals/e-decimals.factor
index 7ef40aa65a..a7d875af3f 100644
--- a/extra/benchmark/e-decimals/e-decimals.factor
+++ b/extra/benchmark/e-decimals/e-decimals.factor
@@ -5,7 +5,7 @@ sequences ;
 IN: benchmark.e-decimals
 
 : D-factorial ( n -- D! )
-    D: 1 [ 0 <decimal> D: 1 D+ D* ] reduce ; inline
+    iota D: 1 [ 0 <decimal> D: 1 D+ D* ] reduce ; inline
 
 :: calculate-e-decimals ( n -- e )
     n [1,b] D: 1
diff --git a/extra/benchmark/empty-loop-2/empty-loop-2.factor b/extra/benchmark/empty-loop-2/empty-loop-2.factor
index f09aee6ada..a6541856a5 100644
--- a/extra/benchmark/empty-loop-2/empty-loop-2.factor
+++ b/extra/benchmark/empty-loop-2/empty-loop-2.factor
@@ -2,7 +2,7 @@ USING: math math.private kernel sequences ;
 IN: benchmark.empty-loop-2
 
 : empty-loop-2 ( n -- )
-    [ drop ] each ;
+    iota [ drop ] each ;
 
 : empty-loop-main ( -- )
     50000000 empty-loop-2 ;
diff --git a/extra/benchmark/fasta/fasta.factor b/extra/benchmark/fasta/fasta.factor
index 5ba285dbb1..bd7ccafb9f 100644
--- a/extra/benchmark/fasta/fasta.factor
+++ b/extra/benchmark/fasta/fasta.factor
@@ -56,7 +56,7 @@ CONSTANT: homo-sapiens
     chars nth-unsafe ; inline
 
 : make-random-fasta ( seed len chars floats -- seed )
-    [ rot drop select-random ] 2curry "" map-as print ; inline
+    [ iota ] 2dip [ [ drop ] 2dip select-random ] 2curry "" map-as print ; inline
 
 : write-description ( desc id -- )
     ">" write write bl print ; inline
@@ -72,7 +72,7 @@ CONSTANT: homo-sapiens
 
 :: make-repeat-fasta ( k len alu -- k' )
     alu length :> kn
-    len [ k + kn mod alu nth-unsafe ] "" map-as print
+    len iota [ k + kn mod alu nth-unsafe ] "" map-as print
     k len + ; inline
 
 : write-repeat-fasta ( n alu desc id -- )
diff --git a/extra/benchmark/gc1/gc1.factor b/extra/benchmark/gc1/gc1.factor
index 4909496d12..91989f204a 100644
--- a/extra/benchmark/gc1/gc1.factor
+++ b/extra/benchmark/gc1/gc1.factor
@@ -3,6 +3,6 @@
 USING: math sequences kernel ;
 IN: benchmark.gc1
 
-: gc1 ( -- ) 600000 [ >bignum 1 + ] map drop ;
+: gc1 ( -- ) 600000 iota [ >bignum 1 + ] map drop ;
 
 MAIN: gc1
diff --git a/extra/benchmark/knucleotide/knucleotide.factor b/extra/benchmark/knucleotide/knucleotide.factor
index a28a676b90..70fa1bb061 100644
--- a/extra/benchmark/knucleotide/knucleotide.factor
+++ b/extra/benchmark/knucleotide/knucleotide.factor
@@ -25,7 +25,7 @@ IN: benchmark.knucleotide
 
 : small-groups ( x n -- b )
     swap
-    [ length swap - 1 + ] 2keep
+    [ length swap - 1 + iota ] 2keep
     [ [ over + ] dip subseq ] 2curry map ;
 
 : handle-table ( inputs n -- )
diff --git a/extra/benchmark/partial-sums/partial-sums.factor b/extra/benchmark/partial-sums/partial-sums.factor
index 023f5de5c2..aa6098a434 100644
--- a/extra/benchmark/partial-sums/partial-sums.factor
+++ b/extra/benchmark/partial-sums/partial-sums.factor
@@ -1,11 +1,11 @@
-! Copyright (C) 2008 Slava Pestov.
+! Copyright (C) 2008, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: math math.functions kernel io io.styles prettyprint
 combinators hints fry namespaces sequences ;
 IN: benchmark.partial-sums
 
 ! Helper words
-: summing-integers ( n quot -- y ) [ 0.0 ] 2dip '[ 1 + @ + ] each ; inline
+: summing-integers ( n quot -- y ) [ 0.0 ] [ iota ] [ ] tri* '[ 1 + @ + ] each ; inline
 : summing-floats ( n quot -- y ) '[ >float @ ] summing-integers ; inline
 : cube ( x -- y ) dup dup * * ; inline
 : -1^ ( n -- -1/1 ) 2 mod 2 * 1 - ; inline
diff --git a/extra/benchmark/random/random.factor b/extra/benchmark/random/random.factor
index 4eab7c1669..761bf8478f 100644
--- a/extra/benchmark/random/random.factor
+++ b/extra/benchmark/random/random.factor
@@ -1,5 +1,5 @@
 USING: io io.files io.files.temp io.encodings.ascii random
-math.parser math ;
+math.parser math sequences ;
 IN: benchmark.random
 
 : random-numbers-path ( -- path )
@@ -7,7 +7,7 @@ IN: benchmark.random
 
 : write-random-numbers ( n -- )
     random-numbers-path ascii [
-        [ 200 random 100 - number>string print ] times
+        [ 200 iota random 100 - number>string print ] times
     ] with-file-writer ;
 
 : random-main ( -- )
diff --git a/extra/benchmark/raytracer-simd/raytracer-simd.factor b/extra/benchmark/raytracer-simd/raytracer-simd.factor
index 45407e5ad2..dcdc911cbf 100644
--- a/extra/benchmark/raytracer-simd/raytracer-simd.factor
+++ b/extra/benchmark/raytracer-simd/raytracer-simd.factor
@@ -149,7 +149,7 @@ DEFER: create ( level c r -- scene )
     [ oversampling /f ] bi@ 0.0 0.0 double-4-boa ;
 
 : ss-grid ( -- ss-grid )
-    oversampling [ oversampling [ ss-point ] with map ] map ;
+    oversampling iota [ oversampling iota [ ss-point ] with map ] map ;
 
 : ray-grid ( point ss-grid -- ray-grid )
     [
@@ -161,8 +161,8 @@ DEFER: create ( level c r -- scene )
     [ [ swap cast-ray + ] with each ] with each ;
 
 : pixel-grid ( -- grid )
-    size reverse [
-        size [
+    size iota reverse [
+        size iota [
             [ size 0.5 * - ] bi@ swap size
             0.0 double-4-boa
         ] with map
diff --git a/extra/benchmark/raytracer/raytracer.factor b/extra/benchmark/raytracer/raytracer.factor
index 2413e7fd1e..868743b46a 100644
--- a/extra/benchmark/raytracer/raytracer.factor
+++ b/extra/benchmark/raytracer/raytracer.factor
@@ -148,7 +148,7 @@ DEFER: create ( level c r -- scene )
     [ oversampling /f ] bi@ 0.0 double-array{ } 3sequence ;
 
 : ss-grid ( -- ss-grid )
-    oversampling [ oversampling [ ss-point ] with map ] map ;
+    oversampling iota [ oversampling iota [ ss-point ] with map ] map ;
 
 : ray-grid ( point ss-grid -- ray-grid )
     [
@@ -160,8 +160,8 @@ DEFER: create ( level c r -- scene )
     [ [ swap cast-ray + ] with each ] with each ;
 
 : pixel-grid ( -- grid )
-    size reverse [
-        size [
+    size iota reverse [
+        size iota [
             [ size 0.5 * - ] bi@ swap size
             double-array{ } 3sequence
         ] with map
diff --git a/extra/benchmark/ring/ring.factor b/extra/benchmark/ring/ring.factor
index ae918b7ebc..08e8edbeff 100644
--- a/extra/benchmark/ring/ring.factor
+++ b/extra/benchmark/ring/ring.factor
@@ -13,7 +13,7 @@ SYMBOL: done
     ] times ;
 
 : send-messages ( messages target -- )
-    dupd [ send ] curry each [ receive drop ] times ; 
+    [ dup iota ] dip [ send ] curry each [ receive drop ] times ; 
 
 : destroy-ring ( target -- )
     done swap send [ done eq? ] receive-if drop ;
diff --git a/extra/benchmark/spectral-norm/spectral-norm.factor b/extra/benchmark/spectral-norm/spectral-norm.factor
index 68efffe083..386ffb0ae1 100644
--- a/extra/benchmark/spectral-norm/spectral-norm.factor
+++ b/extra/benchmark/spectral-norm/spectral-norm.factor
@@ -7,8 +7,8 @@ SPECIALIZED-ARRAY: double
 IN: benchmark.spectral-norm
 
 :: inner-loop ( u n quot -- seq )
-    n [| i |
-        n 0.0 [| j |
+    n iota [| i |
+        n iota 0.0 [| j |
             u i j quot call +
         ] reduce
     ] double-array{ } map-as ; inline
diff --git a/extra/benchmark/tuple-arrays/tuple-arrays.factor b/extra/benchmark/tuple-arrays/tuple-arrays.factor
index 38ce0087a2..701db77135 100644
--- a/extra/benchmark/tuple-arrays/tuple-arrays.factor
+++ b/extra/benchmark/tuple-arrays/tuple-arrays.factor
@@ -9,7 +9,7 @@ TUPLE: point { x float } { y float } { z float } ;
 TUPLE-ARRAY: point
 
 : tuple-array-benchmark ( -- )
-    100 [
+    100 iota [
         drop 5000 <point-array> [
             [ 1 + ] change-x
             [ 1 - ] change-y
diff --git a/extra/benchmark/ui-panes/ui-panes.factor b/extra/benchmark/ui-panes/ui-panes.factor
index 6fdbdaecf6..9d16f75e15 100644
--- a/extra/benchmark/ui-panes/ui-panes.factor
+++ b/extra/benchmark/ui-panes/ui-panes.factor
@@ -2,6 +2,6 @@ USING: ui.gadgets.panes prettyprint io sequences ;
 IN: benchmark.ui-panes
 
 : ui-pane-benchmark ( -- )
-    <pane> <pane-stream> [ 10000 [ . ] each ] with-output-stream* ;
+    <pane> <pane-stream> [ 10000 iota [ . ] each ] with-output-stream* ;
 
 MAIN: ui-pane-benchmark
diff --git a/extra/benchmark/yuv-to-rgb/yuv-to-rgb.factor b/extra/benchmark/yuv-to-rgb/yuv-to-rgb.factor
index 024887991e..b182b4f832 100644
--- a/extra/benchmark/yuv-to-rgb/yuv-to-rgb.factor
+++ b/extra/benchmark/yuv-to-rgb/yuv-to-rgb.factor
@@ -27,9 +27,9 @@ STRUCT: yuv_buffer
         h >>uv_height
         w >>y_stride
         w >>uv_stride
-        w h * [ dup * ] B{ } map-as malloc-byte-array &free >>y
-        w h * 2/ [ dup dup * * ] B{ } map-as malloc-byte-array &free >>u
-        w h * 2/ [ dup * dup * ] B{ } map-as malloc-byte-array &free >>v ;
+        w h * iota [ dup * ] B{ } map-as malloc-byte-array &free >>y
+        w h * 2/ iota [ dup dup * * ] B{ } map-as malloc-byte-array &free >>u
+        w h * 2/ iota [ dup * dup * ] B{ } map-as malloc-byte-array &free >>v ;
 
 : clamp ( n -- n )
     255 min 0 max ; inline
@@ -76,12 +76,12 @@ STRUCT: yuv_buffer
 
 : yuv>rgb-row ( index rgb yuv y -- index )
     over stride
-    pick y_width>>
+    pick y_width>> iota
     [ yuv>rgb-pixel ] with with with with each ; inline
 
 : yuv>rgb ( rgb yuv -- )
     [ 0 ] 2dip
-    dup y_height>>
+    dup y_height>> iota
     [ yuv>rgb-row ] with with each
     drop ;