plus sign (+)

Don’t use the plus sign (+) to replace words like and, over, and plus.

Exception Where space is limited, like in UI or a headline, it’s OK to use the plus sign to indicate a count that exceeds a certain number.

Examples
Microsoft Dynamics 365 and Office 365 are better together.
Choose from more than 750,000 apps in Microsoft Store.
999+ connections (in the UI)

See also ampersand (&)