How do you make an HTML document accessible to people with disabilities?

 There are several ways to make an HTML document accessible to people with disabilities:

1. Use proper headings and semantic elements (such as <header>, <nav>, <main>, <article>, <aside>, <footer>) to create a logical structure for the document.

2. Provide alternative text for all images and other non-text content using the alt attribute.

3. Use label elements to properly associate text labels with form controls.

4. Use aria attributes to provide additional information about the purpose and state of elements on the page, such as the role of an element and whether it is disabled or selected.

5. Use CSS to control the layout and presentation of the document, rather than using table markup or other non-semantic elements.

6. Use clear and simple language, avoid jargon and idioms.

7. Use proper formatting such as headings, bullet points, and paragraphs for easy readability.

8. Use title attribute to provide a short description of the element.

9. Use aria-live to inform assisitve technology of changes to the page.

10. Use tabindex to control the order in which elements are selected by keyboard users.

Note that this list is not exhaustive, and accessibility is an ongoing process that requires ongoing testing and evaluation to ensure that all users can access and understand the content.