I found this following definition, basically they just want to know if you've used a computerized data system in the workplace:
Management Information Systems (MIS), are information systems, typically computer based, that are used within an organization. WordNet described an information system as a system consisting of the network of all communication channels used within an organization. ... components that collect, manipulate, and disseminate data or information... people, communications systems such as telephone lines, and the data itself. The activities involved include inputing data, processing of data into information, storage of data and information, and the production of outputs such as management reports...
Decision Support Systems, Expert systems, and Executive information systems.
(MIS) A computer system, usually based on a {mainframe} or {minicomputer}, designed to provide management
personnel with up-to-date information on an organisation's performance, e.g. inventory and sales. These systems output information in a form that is useable by managers at all levels of the organisation: strategic, tactical, and operational.
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The term system in MIS implies order, arrangement and purpose. The information can be used for various purposes,