| PAscColumn | Pointer to TAscColumn type |
| PFormatLine | Pointer to TFormatLine type |
| PHistogramBucket | Pointer to THistogramBucket type |
| PPaletteTuples | Pointer to TPaletteTuples type |
| TA08c | A one-dimensional dynamic array ShortInt |
| TA08u | A one-dimensional dynamic array Byte |
| TA16c | A one-dimensional dynamic array SmallInt |
| TA16u | A one-dimensional dynamic array Word |
| TA32c | A one-dimensional dynamic array LongInt |
| TA32f | A one-dimensional dynamic array Single |
| TA32u | A one-dimensional dynamic array LongWord |
| TA64c | A one-dimensional dynamic array Int64 |
| TA64f | A one-dimensional dynamic array Double |
| TA80f | A one-dimensional dynamic array Extended |
| TABol | A one-dimensional dynamic array Boolean |
| TAscColumn | Table column parameters from ASCII-TABLE extension |
| TAstr | A one-dimensional dynamic array string |
| TBitPix | The bit depth of data values |
| TBound | A Record, isothetical rectangle defined by minimum and maximum integer point |
| TBuffer | A one-dimensional dynamic array Byte |
| TCard | A header line: structure of an 80-character string |
| TClip | A polygon defined from 1 to 8 real points |
| TDesignPoint | A scene point for affine transformations |
| TDesignShift | Shift value for affine transformations |
| TEndianness | A platform byte order: big-endian or little-endian |
| TFmtMeaCoord | The format of Right Ascension: degrees or hours |
| TFmtRepCoord | The text representation of Right Ascension and Declination: decimal or hexadecimal |
| TFmtShortDate | The short format of Date representation: YY-MM-DD or DD-MM-YY |
| TFormatLine | The parameters of parse and compose lines of the header |
| TFrameBand | The tabular values of the mapping function: physical pixel value (amplitude) to color space value (palette) |
| THistogramBucket | Histogram item: physical value and frequency of the frame pixel |
| THistogramBuckets | Histogram data: array of THistogramBucket |
| THistogramIndexRange | The dynamic range of histogram data |
| TMatrix | A square matrix [3 x 3] of affine transformations in the system of homogeneous coordinates |
| TOrderType | HDU order in FITS container |
| TPaletteIndexs | The mapping a frame data (two-dimensional array of physical pixel values) in color space (palette indices) |
| TPaletteTuple | Palette item: RGB-value |
| TPaletteTuples | Palette data: array of TPaletteTuple |
| TPix | Coordinate (X, Y): an integer point on the plane |
| TPixmap | The mapping a frame data region in the palette space |
| TPnt | Coordinate (X, Y): a real point on the plane |
| TPntsClip | Array [1 .. 8] of real points |
| TPntsQuad | Array [1 .. 4] of real points |
| TQuad | Quadrilateral, the polygon defined from a 4 real points |
| TRegion | A rectangular region of the frame defined by the top-left integer point and integer width and height |
| TRepNumber | A physical representation of data values: integer or floating-point numbers |
| TSliceDateTime | Part of TDateTime type: Date and Time, Date only or Time only |