What is a business server?

A business server is a dedicated computer or software system used by businesses and organisations to centralize data storage, manage network resources, and provide various services to clients within the organization.
These servers are specifically configured to handle tasks such as data storage, email hosting, file sharing, remote access, and more.
Business servers help improve efficiency, security, and collaboration within the workplace by facilitating the sharing and management of critical data and applications among employees.
Typically, several workstations will connect to the server for data access.

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HP article : What is a Small Business Server?