> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Engine Loaders Overview

> Engine Loaders Overview in the ABBYY FineReader Engine API — This section describes the interfaces and objects which can be used for loading and unloading the Engine object.

<Note>
  FRE for Windows.
</Note>

This section describes the interfaces and objects which can be used for loading and unloading the [Engine](/fine-reader/engine/api-reference/engine-object-iengine-interface) object.

ABBYY FineReader Engine provides several ways to load the Engine object. The detailed description of these ways you can find in the [Different Ways to Load the Engine Object](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/different-ways-to-load-engine) section.

This section describes the following objects and interfaces:

* [IEngineLoader](/fine-reader/engine/api-reference/engine-loaders/iengineloader)
* [InprocLoader](/fine-reader/engine/api-reference/engine-loaders/inprocloader)
* [OutprocLoader](/fine-reader/engine/api-reference/engine-loaders/outprocloader)
* [IHostProcessControl](/fine-reader/engine/api-reference/engine-loaders/ihostprocesscontrol)