> ## 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.

# Specifications

> Specifications for ABBYY FineReader Engine 12: supported image and document formats, recognition languages, text types, barcodes, and MRZ fields.

This section contains the descriptions of ABBYY FineReader Engine 12 general features:

<Note>
  If a term is applicable to a specific platform for FRE, it will be followed by L (Linux), M (macOS), or W (Windows).
</Note>

* [Supported Image Formats](/fine-reader/engine/specifications/supported-image-formats)
* [Supported Digital Document Input Formats](/fine-reader/engine/specifications/supported-digital-document-input-formats) (L, W)
* [Predefined Languages](/fine-reader/engine/specifications/predefined-languages)
* [Special Predefined Languages](/fine-reader/engine/specifications/special-predefined-languages) (W)
* [Text Types](/fine-reader/engine/specifications/text-types)
* [Barcode Types](/fine-reader/engine/specifications/barcode-types)
* [Machine-Readable Zone Fields](/fine-reader/engine/specifications/machine-readable-zone-fields)
* [Export Formats](/fine-reader/engine/specifications/export-formats)
* [Predefined Profiles Specification](/fine-reader/engine/specifications/predefined-profiles-specification)
* [What's New in ABBYY FineReader Engine 12](/fine-reader/engine/specifications/whats-new)
* [Backward Compatibility Issues](/fine-reader/engine/specifications/backward-compatibility-issues)
* [Differences between ABBYY FineReader Engine 12 for Windows and Linux](/fine-reader/engine/specifications/differences-between-abbyy-finereader-engine-for-windows-and-linux) (L)
* [Differences between ABBYY FineReader Engine 12 for Windows and Mac](/fine-reader/engine/specifications/differences-between-abbyy-finereader-engine-for-windows-and-macos) (M)
* [Migration Guide from ScanDifFinder SDK to Document Comparison API](/fine-reader/engine/specifications/migration-guide-from-scandiffinder-sdk-to-document-comparison-api) (W)
* [Version History](/fine-reader/engine/specifications/version-history) (W)
* [Change Log](/fine-reader/engine/release-notes/12.8)
* [System Requirements](/fine-reader/engine/specifications/system-requirements)