The unsubscribe command used within electronic mailing lists
Unsubscribing from a mailing list, where an individual or an organization sends material to multiple recipients
Unsubscribing from a subscription business model, where a customer must pay a subscription price to have access to a product or service
A widely used internet meme indicating that the original email of a thread is too long to be read or paid attention to by the intended recipient. Frequently used by software developers and researchers who jokingly refuse to communicate with each other.