Here are the top 10 shorthands of HTML:

1. <br> : This is the shorthand for a line break tag. It is used to insert a line break or new line within a paragraph or other HTML element.

2. <hr> : This is the shorthand for a horizontal rule tag. It is used to create a horizontal line to separate content.

3. <img> : This is the shorthand for an image tag. It is used to insert images into HTML documents.

4. <a> : This is the shorthand for an anchor tag. It is used to create hyperlinks that can be clicked to navigate to other pages or sections within a page.

5. <ul> : This is the shorthand for an unordered list tag. It is used to create bulleted lists.

6. <ol> : This is the shorthand for an ordered list tag. It is used to create numbered lists.

7. <li> : This is the shorthand for a list item tag. It is used to mark individual items within a list.

8. <table> : This is the shorthand for a table tag. It is used to create tables for displaying data.

9. <tr> : This is the shorthand for a table row tag. It is used to create rows within a table.

10. <td> : This is the shorthand for a table data tag. It is used to create cells within a table row.

These shorthands are commonly used in HTML documents and can save time and effort when creating web pages.