👉 Mainlines are lines of communication that are commonly used in various contexts, such as business, academia, or politics. They are often used to convey a message, exchange information, and facilitate collaboration between individuals or groups. Mainlines can be formal or informal, depending on their purpose and audience. In business, mainlines are typically used for sending out marketing materials, product brochures, or other promotional materials to potential clients. They can also be used in academic settings to share research findings with peers