Which of the following types of Information Systems is designed for collaborative work?

The choice of Workgroup Information System is particularly fitting because this type of system is tailored to support the collaborative efforts of a team. Workgroup Information Systems enable multiple users to work together on shared projects, facilitating communication, document sharing, and coordination. Features such as version control, project management tools, and real-time collaboration tools are common in these systems, significantly enhancing productivity and teamwork.

In contrast, Personal Information Systems are focused on individual users, managing personal tasks and information without the collaborative features necessary for teamwork. Social Information Systems, while fostering communication, typically serve broader social interactions and may not be as structured for focused group tasks. External Information Systems provide data and insights from sources outside the organization but do not necessarily facilitate collaborative work among individuals or teams. Thus, Workgroup Information Systems uniquely provide the necessary tools and environment for effective collaboration, making it the correct answer.