u1               union (no tag) (size 0x0002 bytes) in struct (no tag)
         +0x0000 graphics/copper.h: *38
u2               union (no tag) (size 0x0002 bytes) in struct (no tag)
         +0x0002 graphics/copper.h: *43
u3               union (no tag) (size 0x0004 bytes) in struct CopIns
         +0x0002 graphics/copper.h: *45
u4               struct (no tag) (size 0x0004 bytes) in union (no tag)
         +0x0000 graphics/copper.h: *44
unit_MsgPort     struct MsgPort(size 0x0022 bytes) in struct Unit
         +0x0000 exec/devices.h: *34
unit_OpenCnt     unsigned short int in struct Unit +0x0024 exec/devices.h: *38
unit_flags       unsigned char in struct Unit +0x0022 exec/devices.h: *36
unit_pad         unsigned char in struct Unit +0x0023 exec/devices.h: *37
unusedreg        unsigned char in struct CIA +0x0b00 hardware/cia.h: *54
UBYTE            unsigned char  exec/types.h: *49
UCOUNT           unsigned short int  exec/types.h: *59
UCopIns          pointer to struct UCopList in struct ViewPort
         +0x0014 graphics/view.h: *49
UCopList         structure tag size 0x000c graphics/copper.h: *83, 85
                 graphics/view.h: 49
ULONG            unsigned long int  exec/types.h: *39
UNITF_ACTIVE     #define (1<<0) = 0x00000001  exec/devices.h: *42
UNITF_INTASK     #define (1<<1) = 0x00000002  exec/devices.h: *43
UNIT_ECLOCK      #define 2 = 0x00000002  devices/timer.h: *21
UNIT_MICROHZ     #define 0 = 0x00000000  devices/timer.h: *19
UNIT_VBLANK      #define 1 = 0x00000001  devices/timer.h: *20
UNIT_WAITECLOCK  #define 4 = 0x00000004  devices/timer.h: *23
UNIT_WAITUNTIL   #define 3 = 0x00000003  devices/timer.h: *22
UPFRONTGADGET    #define 0 = 0x00000000  intuition/intuitionbase.h: *47
UPIMAGE          #define (0x0BL) = 0x0000000b  intuition/imageclass.h: *107
USEREQIMAGE      #define 0x0020 = 0x00000020  intuition/intuition.h: *194
USER_COPPER_CLIP #define 0x20 = 0x00000020  graphics/view.h: *145
USE_BPLCON3      #define 1 = 0x00000001  hardware/custom.h: *162
USHORT           unsigned short int  exec/types.h: *57
US_LEGAL         #define 0x10 = 0x00000010  intuition/preferences.h: *186
US_LETTER        #define 0x00 = 0x00000000  intuition/preferences.h: *185
UTILITY_DATE_H   #define 1 = 0x00000001  utility/date.h: *2
UTILITY_HOOKS_H  #define TRUE = 0x00000001  utility/hooks.h: *2, 1
                 dos/exall.h: 19
                 intuition/classes.h: 15
                 intuition/classusr.h: 16
                 libraries/asl.h: 28
UTILITY_TAGITEM_H #define TRUE = 0x00000001  utility/tagitem.h: *2, 1
                 intuition/intuition.h: 51
                 intuition/screens.h: 39
                 dos/dostags.h: 17
                 graphics/displayinfo.h: 27
                 graphics/videocontrol.h: 19
                 intuition/gadgetclass.h: 23
                 intuition/icclass.h: 16
                 intuition/imageclass.h: 16
                 libraries/asl.h: 32
                 libraries/gadtools.h: 21
UWORD            unsigned short int  exec/types.h: *42
UnReadChar       macro (1 argument)   dos/stdio.h: *19
UndoBuffer       pointer to unsigned char in struct StringInfo
         +0x0004 intuition/intuition.h: *528
UndoPos          short int in struct StringInfo
         +0x000e intuition/intuition.h: *534
Unit             structure tag size 0x0026 exec/devices.h: *33
                 exec/io.h: 23, 32
                 devices/printer.h: 145, 159
                 devices/trackdisk.h: 241
UserData         pointer to void in struct Gadget
         +0x0028 intuition/intuition.h: *261
UserData         pointer to char in struct Window
         +0x0078 intuition/intuition.h: *885
UserData         pointer to unsigned char in struct Screen
         +0x0156 intuition/screens.h: *149
UserPort         pointer to struct MsgPort in struct Window
         +0x0056 intuition/intuition.h: *856
UtilityBase      pointer to unsigned long int in struct GfxBase
         +0x019e graphics/gfxbase.h: *91