When it comes to describing the concept of a "service bureau", there are a handful of different terms and phrases that can be used interchangeably. Some of the most commonly used synonyms for this concept include "outsourcing provider", "third-party service provider", "managed services provider", and "vendor". Each of these terms essentially refers to an external entity that provides a particular service or set of services to a company or organization. Whether it's IT support, marketing services, or administrative assistance, a service bureau can be a valuable resource for businesses looking to streamline their operations and focus on their core competencies.