Abstract: An information providing device includes processing circuitry configured to monitor occurrence of a failure on a network, and display a screen that visualizes topology indicating connection relations among an Internet service provider (ISP) network included in the network, a fixed communication network and a mobile communication network connected to the Internet service provider network, and a closed network, a situation of connection from a site of a user to the fixed communication network and the mobile communication network, and a monitoring result.

Abstract: A paper cassette unit includes a base part installed in an image forming system, a paper cassette having a compartment in which sheets of paper are accommodated, the paper cassette being detachably mounted in the base part, a cassette cover for covering an opening of the compartment when the paper cassette is mounted in the base part, and a connecting part connecting the cassette cover to the base part in such a way that only the cover stays in the base part when the paper cassette is demounted from the base part.