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The Speech category includes services such as Speech-to-Text, which transcribes audible speech into readable text, Text-to-Speech, which converts text to lifelike speech for natural interfaces, and Speaker Recognition, which can identify and verify people based on their audio.

The Language category includes services such as Entity Recognition, which can identify commonly-used and domain-specific terms, Sentiment Analysis, which can automatically detect sentiments and opinions from text, and Question Answering, which can distill information into easy-to-navigate questions and answers.

The Vision category includes services such as Azure Cognitive Services for Vision, which can identify and analyze content within images and videos, and Customized Vision, which can be customized for image recognition to fit specific business needs.

The Decision category includes services such as Anomaly Detector, which can identify potential problems early on, Content Moderator, which can detect potentially offensive or unwanted content, and Personalizer, which can create rich, personalized experiences for every user.

Finally, the OpenAI category includes the OpenAI Service, which uses advanced coding and language models to power a variety of use cases.
Overall, Azure Cognitive Services provides a range of powerful tools for businesses and developers to enhance their applications and create more intuitive and user-friendly experiences.