Safety cut rope axe man In the first nuclear reactor, constructed by Enrico Fermi in 1942 under the bleachers of the University of Chicago football stadium, the control rods were held up by a manila rope. A man with an axe was told to cut the rope if the reactor got out of hand. This "safety cut rope axe man" is supposedly the origin of the term SCRAM for an emergency shutdown procedure. Brian Hayes, Infrastructure: A Guide to the Industrial Landscape wordsacronymsenergy
The Method of Loci An Article fs.blog From the time we learn to walk, we start building up spatial memories—recollections of the layouts of physical spaces and their relationships to the objects in them. These memories tend to form fast and stick around for a long time. The method of loci hijacks our innate aptitude for remembering physical spaces, using it to help us remember other kinds of information with greater ease. On Memory Palaces & Visual Computation memoryspaceplace