| AnsiChar | Alias for 1-byte sized char. | 
| Byte | An unsigned 8-bits integer | 
| Cardinal | An unsigned 32-bits integer. | 
| Char | Character type (1 byte) | 
| CodePointer | Code pointer (8/16 bit targets) | 
| CodePointer | Code pointer (8/16 bit targets) | 
| CodePtrInt | Signed Integer with same size as CodePointer | 
| CodePtrInt | Signed Integer with same size as CodePointer | 
| CodePtrUInt | Unsigned Integer with same size as CodePointer | 
| CodePtrUInt | Unsigned Integer with same size as CodePointer | 
| Comp |  | 
| DWord | An unsigned 32-bits integer | 
| EnumResLangProc | Callback for language resource enumeration | 
| EnumResNameProc | Callback for resource name enumeration | 
| EnumResTypeProc | Callback for resource type enumeration | 
| FarPointer | Far pointer (8/16 bit targets) | 
| FileRec | Untyped file type | 
| float32 |  | 
| float64 |  | 
| HGLOBAL | Windows compatibility type for use in resources | 
| HMODULE | Windows compatibility type for use in resources | 
| HRESULT | 32-Bit signed integer. | 
| IInterface | Basic interface for all COM based interfaces | 
| Int16 | A signed 16-bits integer | 
| Int32 | A signed 32-bits integer | 
| Int64 | 64-bit, signed integer | 
| Int8 | A signed 8-bits integer | 
| Integer | A signed 16-bits integer | 
| IntegerArray | Generic array of integer. | 
| IntPtr | A signed integer with the same size in bytes as pointer | 
| jmp_buf | Record type to store processor information. | 
| Longint | A signed 32-bits integer | 
| Longword | An unsigned 32-bits integer | 
| MAKEINTRESOURCE | Alias for the PChar  type. | 
| MarshaledAString | Alias for PAnsiChar | 
| MarshaledString | Alias for PWideChar | 
| NativeInt | Alias for PtrInt | 
| NativeUInt | Alias for PtrUInt | 
| OpaquePointer | Type alias for POpaqueData | 
| PAnsiChar | Alias for PChar  type. | 
| PAnsiString | Pointer to an ansistring type. | 
| PBoolean | Pointer to a Boolean type. | 
| PBoolean16 |  | 
| PBoolean32 |  | 
| PBoolean64 |  | 
| PBoolean8 |  | 
| PByte | Pointer to byte  type | 
| PByteBool |  | 
| pcalldesc | Pointer to TCallDesc  record. | 
| PCardinal | Pointer to Cardinal  type | 
| PChar | Pointer to null-terminated string. | 
| PClass | Pointer to TClass | 
| PCodePointer | Pointer to CodePointer | 
| PCurrency | Pointer to currency type. | 
| PDate | Pointer to a TDateTime  type. | 
| PDateTime | Pointer to TDatetime | 
| PDispatch | Pointer to IDispatch  interface type | 
| pdispdesc | Pointer to tdispdesc  record | 
| PDouble | Pointer to double-sized float value. | 
| PDWord | Pointer to DWord  type | 
| pdynarrayindex | Pointer to tdynarrayindex  type. | 
| pdynarraytypeinfo | Pointer to TDynArrayTypeInfo  type. | 
| PError | Pointer to an Error  type. | 
| PEventState | Pointer to EventState, which is an opaque type. | 
| PExceptAddr | Pointer to exception address record | 
| PExceptObject | Pointer to Exception handler procedural type TExceptProc | 
| PExtended | Pointer to extended-sized float value. | 
| PFileTextRecChar | Pointer to TFileTextRecChar | 
| PGuid | Pointer to TGUID  type. | 
| PInt16 | Pointer to Int16  type | 
| PInt32 | Pointer to Int32  type | 
| PInt64 | Pointer to Int64 type | 
| PInt8 | Pointer to Int8  type | 
| PInteger | Pointer to integer  type | 
| PIntegerArray | Pointer to IntegerArray  type | 
| PInterface | Pointer to IInterface  interface | 
| pinterfaceentry | Pointer to tinterfaceentry  record. | 
| pinterfacetable | Pointer to tinterfacetable  record. | 
| PIntPtr | Pointer to IntPtr  type | 
| PJmp_buf | Pointer to jmp_buf  record | 
| PLongBool | Pointer to a LongBool type. | 
| PLongint | Pointer to Longint  type | 
| PLongWord | Pointer to LongWord type | 
| PMarshaledAString | Pointer to PWideChar | 
| PMarshaledString | Pointer to PWideChar | 
| PMemoryManager | Pointer to TMemoryManager  record | 
| PMethod | Pointer to method | 
| PMsgStrTable | Pointer to array of TMsgStrTable  records. | 
| PNativeInt | Pointer to NativeInt  type | 
| PNativeUInt | Pointer to NativeInt  type | 
| PointerArray | Generic pointer array. | 
| POleVariant | Pointer to OleVariant type. | 
| POpaqueData | Pointer to unknown data | 
| PPAnsiChar | Alias for PPChar  type. | 
| PPByte | Pointer to PByte type. | 
| PPChar | Pointer to an array of pointers to null-terminated strings. | 
| PPCharArray | Pointer to TPCharArray  type. | 
| PPCodePointer | Pointer to PCodePointer | 
| PPDispatch | Pointer to PDispatch  pointer type | 
| PPDouble | Pointer to PDouble type. | 
| ppdynarraytypeinfo | Pointer to pdynarraytypeinfo | 
| PPLongint | Pointer to PLongint type. | 
| PPointer | Pointer to a pointer type. | 
| PPointerArray | Pointer to PointerArray  type | 
| PPPAnsiChar | Pointer to PPAnsichar | 
| PPPChar | Pointer to PPChar. | 
| PPPointer | Pointer to a PPointer  type. | 
| PPPWideChar | Pointer to PPWideChar type. | 
| PPtrInt | Pointer to PtrInt  type. | 
| PPtrUInt | Pointer to unsigned integer of pointer size | 
| PPUnknown | Pointer to untyped pointer | 
| PPVmt | Pointer to PVMT pointer. | 
| PPWideChar | Pointer to link id="PWideChar"> type. | 
| PQWord | Pointer to QWord type | 
| PQWordBool |  | 
| PRawByteString | Pointer to RawByteString | 
| PRTLCriticalSection | Pointer to #rtl.system.TRTLCriticalSection  type. | 
| PRTLEvent | Pointer to RTLEvent, which is an opaque type. | 
| PShortInt | Pointer to shortint  type | 
| PShortString | Pointer to a shortstring type. | 
| PSingle | Pointer to single-sized float value. | 
| PSizeInt | Pointer to a SizeInt  type | 
| PSizeUInt | Pointer to SizeUint | 
| PSmallInt | Pointer to smallint  type | 
| pstringmessagetable | Pointer to TStringMessageTable  record. | 
| PText | Pointer to text file. | 
| PtrInt | Signed integer type with same size as Pointer. | 
| PtrInt | Signed integer type with same size as Pointer. | 
| PtrUInt | Unsigned integer type with same size as Pointer. | 
| PtrUInt | Unsigned integer type with same size as Pointer. | 
| PUCS2Char | Pointer to UCS2Char  character. | 
| PUCS4Char | Pointer to UCS4Char | 
| PUCS4CharArray | Pointer to array of UCS4Char  characters. | 
| PUInt16 | Pointer to UInt16  type | 
| PUInt32 | Pointer to UInt32  type | 
| PUInt64 | Pointer to UInt64 | 
| PUInt8 | Pointer to UInt8  type | 
| PUintPtr | Pointer to UIntPtr  type | 
| PUnicodeChar | Pointer to Unicode character | 
| PUnicodeString | Pointer to unicodestring | 
| PUnknown | Untyped pointer | 
| PUTF8Char | Pointer to UTF8Char | 
| PUTF8String | Pointer to UTF8String | 
| pvararray | Pointer to TVarArray  type. | 
| pvararraybound | Pointer to tvararraybound  type. | 
| pvararrayboundarray | Pointer to tvararrayboundarray  type. | 
| pvararraycoorarray | Pointer to tvararraycoorarray  type. | 
| pvardata | Pointer to TVarData  record. | 
| PVariant | Pointer to Variant type. | 
| pvariantmanager | Pointer to TVariantManager  record. | 
| PVarRec | Pointer to TVarRec  type. | 
| PVmt | Pointer to TVMT  record | 
| PWideChar | Pointer to WChar . | 
| PWideString | Pointer to widestring type | 
| PWord | Pointer to word  type | 
| PWordBool | Pointer to a WordBool type. | 
| QWord | 64-bit unsigned integer | 
| RawByteString | Single-byte character string without specified codepage | 
| Real | Alias for real type | 
| Real48 | TP compatible real type (6 bytes) definition | 
| Shortint | A signed 8-bits integer | 
| SizeInt | Signed integer type which fits for sizes | 
| SizeInt | Signed integer type which fits for sizes | 
| SizeUInt | Unsigned Integer type which fits for sizes | 
| SizeUInt | Unsigned Integer type which fits for sizes | 
| Smallint | A signed 16-bits integer | 
| TAbstractErrorProc | Abstract error handler procedural type. | 
| TAllocateThreadVarsHandler | Threadvar allocation callback type for TThreadManager . | 
| TAnsiChar | Alias for 1-byte sized char. | 
| TAssertErrorProc | Assert error handler procedural type. | 
| TBacktraceStrFunc | Type for formatting of backtrace dump. | 
| TBasicEventCreateHandler | callback type for creating eventstate in TThreadManager . | 
| TBasicEventHandler | Generic callback type for handling eventstate in TThreadManager . | 
| TBasicEventWaitForHandler | Wait for basic event callback type for TThreadManager . | 
| TBeginThreadHandler | Callback for thread start in TThreadManager . | 
| TBoundArray | Dynamic array of integer. | 
| tcalldesc | COM/OLE dispatch call argument description. | 
| TClass | Class of TObject . | 
| TCompareOption | How to compare strings | 
| TCompareOptions | Set of TCompareOption | 
| TCriticalSectionHandler | Generic callback type for critical section handling in TThreadManager . | 
| TCriticalSectionHandlerTryEnter | Function prototype for TryEnterCriticalsection | 
| TCtrlBreakHandler | CTRL-C Handler prototype | 
| TDate | Alias for TDateTime type. | 
| TDateTime | Encoded Date-Time type. | 
| tdispdesc | COM/OLE dispatch call description. | 
| TDoubleRec | Extended value record | 
| tdynarrayindex | Type with the correct size for index into a dynamic array. | 
| tdynarraytypeinfo | Type information for a dynamic array. | 
| TDynLibsManager | Dynamic library loading support | 
| TEndThreadHandler | Callback for thread end in TThreadManager . | 
| TEntryInformation | Executable entry point information structure | 
| TEntryInformationOS | Entry information for the OS | 
| TError | Error type, used in variants. | 
| TErrorProc | Standard error handler procedural type. | 
| TExceptAddr | Exception stack address descriptor | 
| TExceptObject | Exception object | 
| TExceptProc | Exception handler procedural type | 
| TExitCode |  | 
| TExitCode |  | 
| TextBuf | Text buffer | 
| TExtended80Rec | Extended value record | 
| TextFile | Alias for Text file type. | 
| TextRec | Text file type | 
| TFileTextRecChar | Character type for the filename part in file records | 
| TFloatSpecial | Special floating point values | 
| TFPCHeapStatus | Record describing the state of the default FPC heap manager. | 
| TFPResourceHandle | Handle to resource | 
| TFPResourceHGLOBAL | TFPResourceHGLOBAL | 
| TFPResourceHMODULE | Handle to module containing resource | 
| TFPUException | Type describing Floating Point processor exceptions. | 
| TFPUExceptionMask | Set of TFPUException | 
| TFPUPrecisionMode | Type describing the default precision for Floating Point math. | 
| TFPURoundingMode | How to round floating point values | 
| TGetCurrentThreadIdHandler | Callback type for retrieving thread ID in TThreadManager . | 
| TGetLoadErrorStrHandler | Get last load error description string handler type | 
| TGetProcAddressHandler | Get procedure address handler type | 
| TGetProcAddressOrdinalHandler | Get procdure address by ordinal handler type | 
| TGuid | Standard GUID representation type. | 
| THandle | Type alias. | 
| THeapStatus | Record describing current heap status. | 
| TInitThreadVarHandler | Threadvar initialization callback type for TThreadManager . | 
| TInterfacedClass | TObject  descendent implementing the IInterface  interface | 
| tinterfaceentry | Interfaces table entry. | 
| tinterfaceentrytype | Dispatch interface entry type | 
| tinterfacetable | Record to store list of interfaces of a class. | 
| TLibHandle | Library handle type | 
| TLineEndStr | Line ending string type | 
| TLoadLibraryAHandler | >Load library (ansistring) handler type | 
| TLoadLibraryUHandler | Load library (unicode) handler type | 
| TMemoryManager | Record describing the current memory manager | 
| TMethod | Record describing a method. | 
| TMsgStrTable | Record used in string message handler table. | 
| TOpaqueData | Empty record | 
| TOrdinalEntry | Ordinal of entry point (windows only) | 
| TOSTimestamp |  | 
| TPCharArray | Array of PChar | 
| TProcedure | Simple procedural type. | 
| TReleaseThreadVarsHandler | Threadvar release callback type for TThreadManager . | 
| TRelocateThreadVarHandler | Threadvar relocalization callback type for TThreadManager . | 
| TResourceHandle | Handle to a resource, for use in the resource loading routines | 
| TResourceManager | Resource manager definition | 
| TRTLCreateEventHandler | Callback type for creating a TRTLEvent type in TThreadManager . | 
| TRTLCRITICALSECTION | A critical section. | 
| TRTLEventHandler | Generic TRTLEvent handling type for TThreadManager . | 
| TRTLEventHandlerTimeout | TRTLEvent timeout handling type for TThreadManager . | 
| trtlmethod | Callback type for synchronization event. | 
| TRuntimeError | Type of runtime-error for the Error procedure | 
| TSafeCallErrorProc | Prototype for the safecall error handler | 
| TSemaphoreDestroyHandler | Function prototype for destroying a semaphore | 
| TSemaphorePostHandler | Function prototype for posting an event to a semaphore | 
| TSemaphoreWaitHandler | Function prototype to wait on a semaphore | 
| TSempahoreInitHandler | Function prototype for initializing a semaphore | 
| TSingleRec | Extended value record | 
| TStandardCodePageEnum | Description of standard used codepages | 
| TStringMessageTable | String message table container for class. | 
| TSystemCodePage | System code page | 
| TTextBuf | Alias for TextBuf | 
| TTextLineBreakStyle | Text line break style. (end of line character) | 
| TThreadFunc | Thread function prototype | 
| TThreadGetPriorityHandler | Callback type for thread priority getting in TThreadManager . | 
| TThreadHandler | Generic thread handler callback for TThreadManager . | 
| TThreadID | Type for Thread-IDs | 
| TThreadManager | Thread manager record. | 
| TThreadSetPriorityHandler | Callback type for thread priority setting in TThreadManager . | 
| TThreadSetThreadDebugNameHandlerA |  | 
| TThreadSetThreadDebugNameHandlerU |  | 
| TThreadSwitchHandler | Callback type for thread switch in TThreadManager . | 
| TTime | Alias for TDateTime type. | 
| TTypeKind | Type of a property or value. | 
| TUCS4CharArray | Array of UCS4Char  characters. | 
| TUnicodeStringManager | Unicode string manager | 
| TUnloadLibraryHandler | Unload library handler type | 
| tvararray | Type describing variant array | 
| tvararraybound | Type describing variant array bounds. | 
| tvararrayboundarray | array of tvararraybound  records. | 
| tvararraycoorarray | Array of variant array coordinates | 
| tvardata | Variant record. | 
| tvariantmanager | Record describing the variant manager. | 
| tvarop | Variant operation. | 
| TVarRec | Record describing an element in an array of const | 
| tvartype | Type with size of variant type. | 
| TVmt | Virtual method table layout | 
| TWaitForThreadTerminateHandler | Callback type for thread termination in TThreadManager . | 
| TWideStringManager | Record containing the various callbacks of the widestring manager. | 
| UCS2Char | UCS2 Unicode character. | 
| UCS4Char | UCS Unicode character (unsigned 32 bit word) | 
| UCS4String | String of UCS4Char  characters. | 
| UInt16 | An unsigned 16-bits integer | 
| UInt32 | An unsigned 32-bits integer | 
| UInt64 | Unsigned 64-bit integer | 
| UInt8 | An unsigned 8-bits integer | 
| UIntPtr | An unsigned integer with the same size in bytes as pointer | 
| UnicodeChar | Unicode string character | 
| UnicodeString | A string consisting of widechars. | 
| UTF8Char | Single byte character | 
| UTF8String | UTF-8 Unicode (Ansi) string. | 
| ValReal | Largest available floating point type | 
| ValSInt | Val-Signed integer. | 
| ValSInt | Val-Signed integer. | 
| ValUInt | Val-unsigned integer | 
| ValUInt | Val-unsigned integer | 
| WChar | Wide char (16-bit sized char) | 
| WideChar | The base two byte character type | 
| WideString | UTF-16 widechar encoded unicode string | 
| Word | An unsigned 16-bits integer |