A computer arrangement for inducing a retraction of a computer component in response to a sensed emergency or security condition. The computer arrangement can include an enclosure with an open inner volume and a support member extendably and retractably retained relative to the enclosure. A computer component, such as a monitor, a keyboard, or a laptop computer, can be retained relative to the support member. One or more sensors can sense an emergency or security condition thereby to induce a retraction of the support member and, possibly, a closing of a lid. The keyboard or laptop computer can be retained relative to a support unit or cradle, which can be manually or automatically pivotable between a storage configuration and a second configuration.