Gas spring includes a cover which works together with a rolling bellows and a bottom part to form a gas-filled spring space, where at least part of the outside surface of the rolling bellows is covered by a sleeve. The notification may cause display, on a device of the assessor, of indicia indicating receipt of the notification in association with an icon representative of an integrated application of the device, and of information indicating a selected content item is available for assessment when the integrated application is selected. However, unlike an agent in a traditional management system, which inspects and acts on the local machine, the pseudo-agent actually inspects and acts on a remote device, or many remote devices.