diff --git a/extra/models/models.factor b/extra/models/models.factor
index a6f1f6909a..6d2b0907c5 100755
--- a/extra/models/models.factor
+++ b/extra/models/models.factor
@@ -1,6 +1,6 @@
-! Copyright (C) 2006, 2007 Slava Pestov.
+! Copyright (C) 2006, 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: generic kernel math sequences timers arrays assocs ;
+USING: generic kernel math sequences arrays assocs alarms ;
 IN: models
 
 TUPLE: model value connections dependencies ref locked? ;
@@ -174,7 +174,7 @@ TUPLE: history back forward ;
     dup history-forward delete-all
     dup history-back (add-history) ;
 
-TUPLE: delay model timeout ;
+TUPLE: delay model timeout alarm ;
 
 : update-delay-model ( delay -- )
     dup delay-model model-value swap set-model ;
@@ -185,12 +185,18 @@ TUPLE: delay model timeout ;
     [ set-delay-model ] 2keep
     [ add-dependency ] keep ;
 
-M: delay model-changed nip 0 over delay-timeout add-timer ;
+: cancel-delay ( delay -- )
+    delay-model-alarm [ cancel-alarm ] when* ;
+
+: start-delay ( delay -- )
+    now over delay-model-timeout dt+ f
+    pick [ f over set-delay-alarm update-delay-model ] curry
+    add-alarm swap set-delay-model-alarm ;
+
+M: delay model-changed nip start-delay ;
 
 M: delay model-activated update-delay-model ;
 
-M: delay tick dup remove-timer update-delay-model ;
-
 GENERIC: range-value ( model -- value )
 GENERIC: range-page-value ( model -- value )
 GENERIC: range-min-value ( model -- value )
diff --git a/extra/timers/authors.txt b/extra/timers/authors.txt
deleted file mode 100644
index 1901f27a24..0000000000
--- a/extra/timers/authors.txt
+++ /dev/null
@@ -1 +0,0 @@
-Slava Pestov
diff --git a/extra/timers/summary.txt b/extra/timers/summary.txt
deleted file mode 100644
index 2b0c0b053f..0000000000
--- a/extra/timers/summary.txt
+++ /dev/null
@@ -1 +0,0 @@
-Simple low-resolution timers
diff --git a/extra/timers/timers-docs.factor b/extra/timers/timers-docs.factor
deleted file mode 100644
index 05a52516ff..0000000000
--- a/extra/timers/timers-docs.factor
+++ /dev/null
@@ -1,36 +0,0 @@
-USING: help.syntax help.markup classes kernel ;
-IN: timers
-
-HELP: init-timers
-{ $description "Initializes the timer code." }
-{ $notes "This word is automatically called when the UI is initialized, and it should only be called manually if timers are being used outside of the UI." } ;
-
-HELP: tick
-{ $values { "object" object } }
-{ $description "Called to notify an object registered with a timer that the timer has fired." } ;
-
-HELP: add-timer
-{ $values { "object" object } { "delay" "a positive integer" } { "initial" "a positive integer" } }
-{ $description "Registers a timer. Every " { $snippet "delay" } " milliseconds, " { $link tick } " will be called on the object. The initial delay from the time " { $link add-timer } " is called to when " { $link tick } " is first called is " { $snippet "initial" } " milliseconds." } ;
-
-HELP: remove-timer
-{ $values { "object" object } }
-{ $description "Unregisters a timer." } ;
-
-HELP: do-timers
-{ $description "Fires all registered timers which are due to fire." }
-{ $notes "This word is automatically called from the UI event loop, and it should only be called manually if timers are being used outside of the UI." } ;
-
-{ init-timers add-timer remove-timer tick do-timers } related-words
-
-ARTICLE: "timers" "Timers"
-"Timers can be added and removed:"
-{ $subsection add-timer }
-{ $subsection remove-timer }
-"Classes must implement a generic word so that their instances can handle timer ticks:"
-{ $subsection tick }
-"Timers can be used outside of the UI, however they must be initialized with an explicit call, and fired manually:"
-{ $subsection init-timers }
-{ $subsection do-timers } ;
-
-ABOUT: "timers"
diff --git a/extra/timers/timers.factor b/extra/timers/timers.factor
deleted file mode 100644
index e3a510287b..0000000000
--- a/extra/timers/timers.factor
+++ /dev/null
@@ -1,30 +0,0 @@
-! Copyright (C) 2005, 2006 Slava Pestov.
-! See http://factorcode.org/license.txt for BSD license.
-USING: assocs kernel math namespaces sequences system ;
-IN: timers
-
-TUPLE: timer object delay next ;
-
-: <timer> ( object delay initial -- timer )
-    millis + timer construct-boa ;
-
-GENERIC: tick ( object -- )
-
-: timers \ timers get-global ;
-
-: init-timers ( -- ) H{ } clone \ timers set-global ;
-
-: add-timer ( object delay initial -- )
-    pick >r <timer> r> timers set-at ;
-
-: remove-timer ( object -- ) timers delete-at ;
-
-: advance-timer ( ms timer -- )
-    [ timer-delay + ] keep set-timer-next ;
-
-: do-timer ( ms timer -- )
-    dup timer-next pick <=
-    [ [ advance-timer ] keep timer-object tick ] [ 2drop ] if ;
-
-: do-timers ( -- )
-    millis timers values [ do-timer ] with each ;
diff --git a/extra/ui/gadgets/gadgets.factor b/extra/ui/gadgets/gadgets.factor
index 0ac43af756..37c5684cc9 100755
--- a/extra/ui/gadgets/gadgets.factor
+++ b/extra/ui/gadgets/gadgets.factor
@@ -1,8 +1,8 @@
-! Copyright (C) 2005, 2007 Slava Pestov.
+! Copyright (C) 2005, 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays hashtables kernel models math namespaces sequences
-timers quotations math.vectors combinators sorting vectors
-dlists models ;
+quotations math.vectors combinators sorting vectors dlists
+models ;
 IN: ui.gadgets
 
 TUPLE: rect loc dim ;
diff --git a/extra/ui/gestures/gestures.factor b/extra/ui/gestures/gestures.factor
index 2a3e344a9e..2d3e8f6835 100755
--- a/extra/ui/gestures/gestures.factor
+++ b/extra/ui/gestures/gestures.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays assocs kernel math models namespaces
 sequences words strings system hashtables math.parser
-math.vectors tuples classes ui.gadgets timers combinators.lib ;
+math.vectors tuples classes ui.gadgets combinators.lib ;
 IN: ui.gestures
 
 : set-gestures ( class hash -- ) "gestures" set-word-prop ;
@@ -107,20 +107,19 @@ SYMBOL: double-click-timeout
 : drag-gesture ( -- )
     hand-buttons get-global first <drag> button-gesture ;
 
-TUPLE: drag-timer ;
+SYMBOL: drag-timer
 
-M: drag-timer tick drop drag-gesture ;
-
-drag-timer construct-empty drag-timer set-global
+<box> drag-timer set-global
 
 : start-drag-timer ( -- )
     hand-buttons get-global empty? [
-        drag-timer get-global 100 300 add-timer
+        now 300 milliseconds dt+ 100 milliseconds
+        [ drag-gesture ] add-alarm drag-timer get-global >box
     ] when ;
 
 : stop-drag-timer ( -- )
     hand-buttons get-global empty? [
-        drag-timer get-global remove-timer
+        drag-timer get-global box> cancel-alarm
     ] when ;
 
 : fire-motion ( -- )
diff --git a/extra/ui/tools/listener/listener-tests.factor b/extra/ui/tools/listener/listener-tests.factor
index f0516f54b9..0024fa725f 100755
--- a/extra/ui/tools/listener/listener-tests.factor
+++ b/extra/ui/tools/listener/listener-tests.factor
@@ -1,12 +1,10 @@
 USING: continuations documents ui.tools.interactor
 ui.tools.listener hashtables kernel namespaces parser sequences
-timers tools.test ui.commands ui.gadgets ui.gadgets.editors
+tools.test ui.commands ui.gadgets ui.gadgets.editors
 ui.gadgets.panes vocabs words tools.test.ui slots.private
 threads ;
 IN: temporary
 
-timers [ init-timers ] unless
-
 [ f ] [ "word" source-editor command-map empty? ] unit-test
 
 [ ] [ <listener-gadget> [ ] with-grafted-gadget ] unit-test
diff --git a/extra/ui/tools/search/search-tests.factor b/extra/ui/tools/search/search-tests.factor
index 47ae786f59..49bd1a3837 100755
--- a/extra/ui/tools/search/search-tests.factor
+++ b/extra/ui/tools/search/search-tests.factor
@@ -1,11 +1,9 @@
 USING: assocs ui.tools.search help.topics io.files io.styles
-kernel namespaces sequences source-files threads timers
+kernel namespaces sequences source-files threads
 tools.test ui.gadgets ui.gestures vocabs
 vocabs.loader words tools.test.ui debugger ;
 IN: temporary
 
-timers get [ init-timers ] unless
-
 [ f ] [
     "no such word with this name exists, certainly"
     f f <definition-search>
@@ -16,7 +14,7 @@ timers get [ init-timers ] unless
 
 : update-live-search ( search -- seq )
     dup [
-        300 sleep do-timers
+        300 sleep
         live-search-list control-value
     ] with-grafted-gadget ;
 
@@ -33,7 +31,6 @@ timers get [ init-timers ] unless
     dup [
         { "set-word-prop" } over live-search-field set-control-value
         300 sleep
-        do-timers
         search-value \ set-word-prop eq?
     ] with-grafted-gadget
 ] unit-test
diff --git a/extra/ui/tools/tools-tests.factor b/extra/ui/tools/tools-tests.factor
index 919d1705af..ff2444e43b 100755
--- a/extra/ui/tools/tools-tests.factor
+++ b/extra/ui/tools/tools-tests.factor
@@ -1,6 +1,6 @@
 USING: ui.tools ui.tools.interactor ui.tools.listener
 ui.tools.search ui.tools.workspace kernel models namespaces
-sequences timers tools.test ui.gadgets ui.gadgets.buttons
+sequences tools.test ui.gadgets ui.gadgets.buttons
 ui.gadgets.labelled ui.gadgets.presentations
 ui.gadgets.scrollers vocabs tools.test.ui ui ;
 IN: temporary
@@ -12,8 +12,6 @@ IN: temporary
     ] unit-test
 ] with-scope
 
-timers get [ init-timers ] unless
-
 [ ] [ <workspace> "w" set ] unit-test
 [ ] [ "w" get com-scroll-up ] unit-test
 [ ] [ "w" get com-scroll-down ] unit-test
diff --git a/extra/ui/ui-docs.factor b/extra/ui/ui-docs.factor
index 7fbd6dbac1..9b3a05e101 100755
--- a/extra/ui/ui-docs.factor
+++ b/extra/ui/ui-docs.factor
@@ -167,7 +167,7 @@ ARTICLE: "ui-backend-init" "UI initialization and the event loop"
 { $subsection start-ui }
 "The " { $link ui } " word must not return until the event loop has stopped and the UI has been shut down."
 $nl
-"The event loop must not block. Instead, it should poll for pending events, then call " { $link ui-step } ", which performs pending layout, runs timers and sleeps for 10 milliseconds, or until a Factor thread wakes up." ;
+"The event loop must not block, since otherwise other Factor threads and I/O will not run. Instead, it should poll for pending events, then call " { $link ui-step } ", which performs pending layout and sleeps for 10 milliseconds." ;
 
 ARTICLE: "ui-backend-windows" "UI backend window management"
 "The high-level " { $link open-window } " word eventually calls a low-level word which you must implement:"
@@ -368,7 +368,6 @@ $nl
 { $subsection "ui-paint" }
 { $subsection "ui-control-impl" }
 { $subsection "clipboard-protocol" }
-{ $subsection "timers" }
 { $see-also "ui-layout-impl" } ;
 
 ARTICLE: "ui" "UI framework"
diff --git a/extra/ui/ui.factor b/extra/ui/ui.factor
index d5d968c4e6..1de0dac6f0 100755
--- a/extra/ui/ui.factor
+++ b/extra/ui/ui.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays assocs io kernel math models namespaces
 prettyprint dlists sequences threads sequences words
-timers debugger ui.gadgets ui.gadgets.worlds ui.gadgets.tracks
+debugger ui.gadgets ui.gadgets.worlds ui.gadgets.tracks
 ui.gestures ui.backend ui.render continuations init combinators
 hashtables ;
 IN: ui
@@ -131,8 +131,7 @@ SYMBOL: ui-hook
     graft-queue [ notify ] dlist-slurp ;
 
 : ui-step ( -- )
-    [ do-timers notify-queued layout-queued redraw-worlds ]
-    assert-depth ;
+    [ notify-queued layout-queued redraw-worlds ] assert-depth ;
 
 : open-world-window ( world -- )
     dup pref-dim over set-gadget-dim dup relayout graft ui-step ;
@@ -156,7 +155,6 @@ M: object close-window
     find-world [ ungraft ] when* ;
 
 : start-ui ( -- )
-    init-timers
     restore-windows? [
         restore-windows
     ] [
diff --git a/extra/ui/windows/windows.factor b/extra/ui/windows/windows.factor
index 3a519e49d2..80c03a3f5d 100755
--- a/extra/ui/windows/windows.factor
+++ b/extra/ui/windows/windows.factor
@@ -5,9 +5,8 @@ ui.backend ui.clipboards ui.gadgets.worlds ui.gestures io kernel
 math math.vectors namespaces prettyprint sequences strings
 vectors words windows.kernel32 windows.gdi32 windows.user32
 windows.opengl32 windows.messages windows.types windows.nt
-windows threads timers libc combinators
-continuations command-line shuffle opengl ui.render unicode.case
-ascii math.bitfields ;
+windows threads libc combinators continuations command-line
+shuffle opengl ui.render unicode.case ascii math.bitfields ;
 IN: ui.windows
 
 TUPLE: windows-ui-backend ;