| Getting 32-bit Allegro CL to run on 64-bit  | Ubuntu | 
| parse- | ucet | 
| OSI process/ | uid/gid interface functions | 
| pwent- | uid | 
| stat- | uid | 
| mailbox- | uidnext | 
| mailbox- | uidvalidity | 
| ftp-stream- | umask | 
 | umask | 
 | unadvise | 
 | unadvise-1 | 
 | unarrest | 
| cell- | unavailable-foreground-color | 
 | unavailable-buttons | 
 | unavailable-color-mapper | 
| barrier- | unblock | 
| slot- | unbound | 
 | unbound-slot | 
 | unbound-slot-instance | 
 | unbound-variable | 
 | uncache-cursor | 
 | uncache-instances-with-pretty-names | 
 | uncache-pixmap | 
 | uncompile | 
| *loaded-but- | uncreated-windows* | 
 | Undecoded responses | 
| Compiler warnings:  | undefined function, inconsistent name usage, unreachable code | 
| compiler- | undefined-functions-called-warning | 
| Emacs reports that a function defined in the interface is  | undefined | 
 | undefined-function | 
 | undefsystem | 
| color- | under-mouse | 
| excl:dumplisp will fail  | under some conditions | 
| grid-part- | under-point | 
| hotspot- | under-mouse | 
| now- | under-mouse | 
| show-help-string- | under-mouse | 
| widget- | under-mouse | 
| window- | under-mouse | 
| Floating-point infinities and NaNs, and floating-point  | underflow and overflow | 
| floating-point- | underflow | 
| same- | underline | 
| toggle- | underline | 
 | underline | 
| with- | underlying-simple-vector | 
| Tilde  | Underscore: Conditional Newline | 
| soap-must- | understand | 
 | undo-command | 
 | undrop-combo-box | 
| *test- | unexpected-failures* | 
| Dealing with an  | unexpected error in an application | 
| report- | unexpected-error-and-exit | 
| Lisp  | unexpectedly sees a change to an argument passed by address | 
| Other strange or  | unexplained behavior | 
 | unexport | 
| save-selection-when- | unfocused | 
| show-selection-when- | unfocused | 
 | ungrab-gate | 
| An  | unhandled error occurred during initialization | 
| An  | unhandled error occurred during initialization: | 
 | unhide | 
 | unhide-frames | 
 | unhide-functions | 
 | unhide-package-internals | 
 | unhide-packages | 
| Links to  | Unicode Reports | 
| sniff-for- | unicode | 
| The  | unicode and fat External-Format Types; the unicode BOM | 
| The unicode and fat External-Format Types; the  | unicode BOM | 
 | Unicode | 
 | unicode-combining-class | 
 | unicode-nfd | 
 | uniform-resizing | 
| Installing Mountain Lion OS (macOS 10.8) may  | uninstall X11 | 
 | Uninstalling an application on Windows | 
 | unintern | 
 | unintern-uri | 
| box- | union | 
| The  | union of two structs | 
 | union, nunion | 
 | Unique ids | 
 | unique-id | 
 | Uniqueness of Remote References | 
| *compilation- | unit-environment* | 
| compilation- | unit | 
| Coordinate System  | Unit of Size | 
| make-compilation- | unit-environment | 
| paper-size- | unit | 
| with-compilation- | unit | 
| device-to-dialog- | units | 
| device-to-scaling- | units | 
| device-to-stream- | units | 
| dialog-to-device- | units | 
| dialog-to-screen- | units | 
| dialog- | units-p | 
| internal-time- | units-per-second | 
| scaling-to-device- | units | 
| screen-to-dialog- | units | 
| screen-to-window- | units | 
| stream-to-device- | units | 
| stream-to-stream- | units | 
| stream-to-window- | units | 
| stream- | units-per-inch | 
| stream- | units-per-mm | 
| texture-info-x-device- | units-per-m | 
| texture-info-y-device- | units-per-m | 
| window-to-screen- | units | 
| window-to-stream- | units | 
| window-to-window- | units | 
| Conversions between date-time and CL  | universal-time | 
| decode- | universal-time | 
| encode- | universal-time | 
| General date to  | universal time parsers | 
| get- | universal-time, get-decoded-time | 
| string-to- | universal-time | 
| timer- | universal-time | 
 | Universal Time | 
 | universal-time-to-string | 
 | universal-to-unix-time | 
| unix-to- | universal-time | 
| *jlinker- | unix-vector-p* | 
| Enough C-c's (on  | Unix) will always interrupt | 
| Lisp as a  | Unix Shared Library | 
| Notes for installation of Allegro CL on  | UNIX (including Linux) | 
| On  | UNIX | 
| Parsing  | Unix pathnames | 
| Remarks on main() on  | Unix | 
| Starting on  | UNIX machines | 
| Starting on  | UNIX using a shell script | 
| Testing that the installation of Allegro CL on  | Unix was successful | 
| The 4.3.x  | UNIX model for foreign functions | 
| universal-to- | unix-time | 
 | Unix symbolic links and truenames | 
 | unix-shared-library.htm | 
 | unix-to-universal-time | 
| Error:  | Unknown hostname: | 
 | unknown-p | 
| when,  | unless | 
 | unlink | 
 | unload-foreign-library | 
| process- | unlock | 
| sharable-lock- | unlock | 
 | unlock-stream | 
 | unpress-automatically | 
 | unpublish-locator | 
| Compiler warnings: undefined function, inconsistent name usage,  | unreachable code | 
| compiler- | unreachable-code-warning | 
| stream- | unread-char | 
 | unread-char | 
| print- | unreadable-object | 
 | unregister-foreign-callable | 
 | unregister-function | 
 | unregister-lisp-value | 
 | unregister-value | 
| Safe and  | Unsafe Calls | 
| Safe and  | unsafe operators | 
 | Unsafe standard Lisp operations: *features*, *modules*, require/provide, external-format loading, etc. | 
 | unschedule-finalization | 
 | unset-parameter-null | 
 | unsetenv | 
| The :nat and : | unsigned-nat types | 
 | unsigned-byte | 
 | unsigned-long-long | 
| : | UNSPECIFIC as a Component Value | 
 | unsubclass-widget | 
| Delaying linking the Allegro CL shared-library  | until runtime | 
 | until | 
| trace,  | untrace | 
 | untrace | 
 | unuse-package | 
 | unwind-protect | 
| *parenthesis-match-pop- | up-milliseconds* | 
| *pop- | up-message-max-height-factor* | 
| *pop- | up-message-max-width-factor* | 
| *show-parenthesis-matches-as-pop- | up-window* | 
| After Allegro Composer starts  | up | 
| After Lisp starts  | up | 
| Allegro CL may have problems starting  | up when run on SELinux | 
| Files Lisp must find to start  | up and files it may need later | 
| Files Lisp needs to start  | up 1: .so (or dll) files built with image | 
| Files Lisp needs to start  | up 2: the Allegro directory | 
| find-or-make-pop- | up-window | 
| How to do CLOS start  | up optimizations | 
| mouse-back- | up | 
| mouse-forward- | up | 
| mouse-left- | up | 
| mouse-left- | up | 
| mouse-middle- | up | 
| mouse-middle- | up | 
| mouse-right- | up | 
| mouse-right- | up | 
| mouse- | up | 
| nc-mouse-left- | up | 
| nc-mouse-left- | up | 
| nc-mouse-middle- | up | 
| nc-mouse-middle- | up | 
| nc-mouse-right- | up | 
| nc-mouse-right- | up | 
| nc-mouse- | up | 
| pop- | up | 
| Pop- | up buffer handling | 
| pop- | up-color-dialog | 
| pop- | up-find-dialog | 
| pop- | up-lettered-menu | 
| pop- | up-menu | 
| pop- | up-menu | 
| pop- | up-menus-for-many-sorted-choices | 
| pop- | up-message-dialog | 
| pop- | up-modal-dialog | 
| pop- | up-printer-job-dialog | 
| pop- | up-printer-setup-dialog | 
| pop- | up-replace-dialog | 
| pop- | up-shortcut-menu | 
| pop- | up-string-dialog | 
| pop- | up-strings-dialog | 
| return-nil-from-pop- | up-dialog | 
| return-t-from-pop- | up-dialog | 
| Set- | up | 
| Setting  | up logical pathname translations | 
| Setting  | up your system for Allegro Composer | 
| Start- | up problems | 
| System start  | up and shut down | 
| The initial locale when Allegro CL starts  | up | 
| The start- | up message | 
 | up | 
 | up-down-control | 
 | up-down-control | 
 | up-down-control-pane | 
| virtual-key- | up | 
| virtual-key- | up | 
| vk- | up | 
| wait-for-mouse-buttons- | up | 
| What Lisp does when it starts  | up | 
| When there is a global gc, how many bytes are freed  | up? | 
| char- | upcase, char-downcase | 
| string- | upcase, ..., nstring-capitalize | 
| string- | upcase, ..., nstring-downcase, nstring-capitalize | 
| string- | upcase, ..., nstring-upcase, nstring-downcase, nstring-capitalize | 
| string-upcase, ..., nstring- | upcase, nstring-downcase, nstring-capitalize | 
| string- | upcase, string-downcase, string-capitalize, nstring-upcase, nstring-downcase, nstring-capitalize | 
| string-upcase, string-downcase, string-capitalize, nstring- | upcase, nstring-downcase, nstring-capitalize | 
| Further  | update information | 
| hmac-md5- | update | 
| hmac-sha1- | update | 
| md5- | update | 
| Release and  | update information | 
| sha1- | update | 
| The Allegro CL  | update naming scheme | 
 | update-all-class-interface-widgets | 
 | update-allegro | 
 | update-atomic | 
 | update-bundle-files | 
 | update-chart-widget | 
 | update-db | 
 | update-dependent | 
 | update-dialog | 
 | update-drawable | 
 | update-instance-for-different-class | 
 | update-instance-for-redefined-class | 
 | update-lamp | 
 | update-menu | 
 | update-module | 
 | update-multi-picture-button | 
 | update-on-resize | 
 | update-scroll-bars-for-new-window-size | 
 | update-system | 
 | update-widgets-of-image-file | 
 | update-window | 
| Allegro CL must be  | updated to work with macOS 10.10 | 
| Entry points are  | updated automatically | 
| Why an  | updated interface | 
| Patches and  | updates | 
 | Updating for macOS 10.10 | 
 | Updating the bundle file | 
 | Updating your application after delivery | 
 | upgraded-array-element-type | 
 | upgraded-complex-part-type | 
| Array  | Upgrading | 
| Reinstalling XQuartz after  | upgrading to macOS 10.10 | 
 | upper-case-p, lower-case-p, both-case-p | 
 | uppercase-object | 
| Tilde Circumflex: Escape  | Upward | 
| copy- | uri | 
| decode-wsdl-at- | uri | 
| ec2-region- | uri | 
| enough- | uri | 
| intern- | uri | 
| make- | uri-space | 
| parse- | uri | 
| pathname-to- | uri | 
| render- | uri | 
| request- | uri | 
| The  | URI API definition | 
| unintern- | uri | 
 | uri | 
 | uri | 
 | URI support in Allegro CL | 
 | uri-authority | 
 | uri-fragment | 
 | uri-host | 
 | uri-p | 
 | uri-parsed-path | 
 | uri-path | 
 | uri-plist | 
 | uri-port | 
 | uri-query | 
 | uri-scheme | 
 | uri-space | 
 | uri-to-pathname | 
 | uri-userinfo | 
 | uri.htm | 
 | uri= | 
 | uriencode-string | 
| do-all- | uris | 
| Interning  | URIs | 
| merge- | uris | 
| wsdl-include- | url | 
| *xml-rpc- | url* | 
| form- | urlencoded- | 
 | urn | 
 | urn-nid | 
 | urn-nss | 
| *region- | us-east* | 
| *region- | us-west* | 
 | usable-height | 
 | usable-left | 
 | usable-top | 
 | usable-width | 
| Compiler warnings: undefined function, inconsistent name  | usage, unreachable code | 
| compiler-inconsistent-name- | usage-warning | 
| External-Format  | Usage | 
| Memory  | Usage | 
| Non-synchronizing  | usages | 
| base64-string-to- | usb8-array | 
| hex-string-to- | usb8-array | 
 | usb8-array-to-base64-string | 
 | usb8-array-to-hex-string | 
| * | use-single-cg-event-handling-process* | 
| * | use-xref-database-only* | 
| abort, continue, muffle-warning, store-value,  | use-value | 
| How to  | use the dumped image | 
| last- | use | 
| Modifying arguments called by address:  | use arrays | 
| package- | use-list | 
| pixmap- | use-handle | 
 | Use of custom.cl | 
 | Use of Read-Time Conditionals | 
 | Use of shared libraries (foreign files) | 
 | use-antialiased-text-in-tree-graphs | 
 | use-background-streams | 
 | use-bitmap-stream | 
 | use-cg-html-browser | 
 | use-cg-timer | 
 | use-color-gradients-in-tree-graphs | 
 | use-default-tooltips | 
 | use-ide-background-window | 
 | use-ide-parent-window | 
 | use-native-size | 
 | use-package | 
 | use-pixmap-handles | 
 | use-pll-file | 
 | use-private-html-browser | 
 | use-real-combo-box | 
 | use-trace-dialog-in-this-process | 
 | use-value | 
| When to  | use icons | 
| Deducing the namespaces  | used in a WSDL file | 
| Definitions of some terms  | used in this document | 
| Notation conventions  | used in this document | 
| package- | used-by-list | 
| process-cpu-msec- | used | 
| process-cpu-msec- | used-delta | 
| The SMTP interface ( | used for sending mail) | 
| Core files: when they are  | useful and what to do with them | 
| Tutorials and additional  | useful information | 
| ask- | user-for-choice | 
| ask- | user-for-choice-from-list | 
| ask- | user-for-color | 
| ask- | user-for-directory | 
| ask- | user-for-existing-pathname | 
| ask- | user-for-font | 
| ask- | user-for-new-or-existing-directory | 
| ask- | user-for-new-pathname | 
| ask- | user-for-string | 
| Chapter 4 of the IDE  | User Guide | 
| Chapter 7 of the IDE  | User Guide | 
| CLIM  | User Guide | 
| color-for- | user-functions | 
| Compile-file Processing of the  | User Interface Macros | 
| Compliance with major mode conventions, including  | user-visible changes after installing the patch | 
| Deciding on top-level ( | user interaction) | 
| IDE  | User Guide | 
| Potential problems with  | user-defined main() on Linux | 
| Processing of the  | User Interface Macros | 
| save-options-to- | user-specific-file | 
| The COMMON-LISP- | USER Package | 
 | User control over the garbage collector | 
 | user-close | 
 | user-collate-p | 
 | user-copies | 
 | User-defined main() | 
 | user-homedir-pathname | 
 | User-level API in the regexp2 module | 
 | user-modifiable | 
 | user-name | 
 | user-scroll | 
| Using the IDE while  | user code is busy | 
| What  | user-homedir-pathname does on Windows | 
| *default-ssh- | user* | 
| *default- | user* | 
| uri- | userinfo | 
 | username-to-home-directory | 
| Mac OS X: IDE installation for Express  | Users | 
 | Users of your app must have necessary software installed (such as X11 and GTK) | 
| Built-in stream methods and their  | uses | 
| mci-device- | uses-files-p | 
 | Uses of excl:dumplisp | 
| who- | uses | 
| who- | uses | 
| (setf slot-value- | using-class) | 
| A note about  | using Foreign Functions on non-os-thread platforms | 
| About creating a Standalone Common Graphics Application without  | using the Project System | 
| About  | using multiple windowing processes in a Common Graphics application | 
| About  | using multiple windowing threads in a CG application | 
| An example  | using Telnet to communicate with a running Lisp process | 
| Another example  | using arrays to pass values | 
| Building and  | Using an Allegro Common Lisp Based DLL | 
| compute-applicable-methods- | using-classes | 
| Creating and  | using pll files | 
| ensure-class- | using-class | 
| ensure-generic-function- | using-class | 
| Examples of  | using the Pretty Printer | 
| Examples  | using advice | 
| Examples  | using Allegro CL | 
| Examples  | using the :explain declaration | 
| Examples  | using the DOM | 
| Examples  | using the Oracle interface | 
| Getting information on memory management  | using cl:room | 
| Installation of your application on Windows  | using the Install Wizard | 
| invoke-html-browser- | using-dde | 
| slot-boundp- | using-class | 
| slot-makunbound- | using-class | 
| slot-value- | using-class | 
| Stack consing, avoiding consing  | using apply, and stack allocation | 
| Starting on UNIX  | using a shell script | 
| Starting on Windows  | using bat files | 
 | Using a built-in icon | 
 | Using An Example Allegro CL Based DLL: fact.dll | 
 | Using Defsystem | 
 | Using Lisp functions and values from C | 
 | Using ODBC | 
 | Using package [package] results in name conflicts... | 
 | Using properties | 
 | Using the default minimal top-level | 
 | Using the IDE while user code is busy | 
 | Using the IDE with Emacs | 
 | Using the jil compiler | 
 | Using the load function | 
 | Using Two Value Axes | 
 | Using Webactions | 
| What is the difference between  | using registers and using the stack? | 
| What is the difference between using registers and  | using the stack? | 
| date-time-to- | ut | 
 | ut-to-date-time | 
 | ut-to-string-formatter | 
| Operators in the  | util-string module | 
| Special  | utilities for loading applications | 
| string- | utilities.htm | 
 | Utilities associated with advice | 
| Modal CG  | utility dialogs are not shared between processes | 
| position- | utility-dialog | 
| String  | utility functions in Allegro CL | 
| The Domain Naming System  | Utility | 
| Various  | utility objects in XML-RPC | 
 | utime | 
| Notes of increasing the default maximum stack size on HP- | UX 11 machines |