| IAllSolidDimensions | Contains (recursively) all dimensions in the solid model, not just "first level" dimensions like ISolidDimensions |
| IAnnotation | Annotation |
| IAnnotationElement | Annotation element |
| IAnnotationElements | Collection of IAnnotationElement objects |
| IAnnotationFeature | Annotation feature |
| IAsmComponent | Assembly component (feature of type ftComponent) |
| IAssemblies | Subset of ISolids that contains only assemblies (IAssembly) |
| IAssembly | Corresponds to a Pro/ENGINEER assembly |
| ICoordinateSystem | A coordinate system geometry item (tCSys) |
| IDimension | Represents a Pro/ENGINEER dimension |
| IDimensions | Collection of Pro/ENGINEER dimensions (IDimension) |
| IDrawing | Pro/E drawing |
| IDrawingCreationErrors | Contains errors that occurred during drawing creation |
| IDrawings | Collection of Pro/ENGINEER drawings (IDrawing) |
| IDrawingView | A view within drawing |
| IDrawingViews | Collection of IDrawingView objects |
| IEdge | Edge |
| IExport3DOptions | Controls behavior of ISolid::Export3D() |
| IExportPDFOptions | Controls behaviour of IModel::ExportPDF() |
| IFeature | Represents a Pro/ENGINEER feature |
| IFeatureDimensions | Dimensions contained in Pro/ENGINEER feature |
| IFeatureGroup | Set of contiguous features that act as a single feature for purposes of some operations |
| IFeatureGroups | Collection of IFeatureGroup elements |
| IFeatures | Collection of Pro/ENGINEER features (IFeature) |
| IGeometryItem | The generic geometry object |
| IMassProperties | Solid model mass properties |
| IModel | Represents a model loaded in Pro/ENGINEER session |
| IModelItem | Represents a Pro/ENGINEER model item |
| IModels | Collection of Pro/ENGINEER models (IModel) |
| IModelWindow | A window in Pro/ENGINEER |
| INote | Annotation of type 'note' |
| IParameter | A parameter within solid model |
| IParameters | Collection of parameters (IParameter) within solid model |
| IPart | Represents a Pro/ENGINEER part. Implements IPart |
| IParts | Subset of ISolids that contains only Pro/ENGINEER parts (IPart) |
| IProE | Represents a running Pro/ENGINEER |
| IQuilt | Collection of surfaces, produced by surface features |
| ISelection | Transient object that allows the client to select referenced object |
| IServer | Represents the whole COM server |
| ISolid | "Solid" model (part or assembly) |
| ISolidDimensions | Collection of dimensions at the level of solid model |
| ISolidDimensionsBase | Base for all dimension collections contained (at some level) in solid model |
| ISolids | Subset of IModels that contains only solid models (ISolid) |
| ISurface | Surface, datum surface, or datum plane |
| ITrail | This object lets you either load the trail from the file or construct it on-the-fly and then execute it |
| IUdfData | Fill it to describe how the UDF should be placed in the solid |
| IUnitSystem | Unit system associated to Pro/ENGINEER model |
| IUnitSystems | Collection of IUnitSystem elements |
| IView | View in drawing or named view associated with solid |
1.5.1-p1