precedes the peak value of the current (I). With L, the symbol for inductance, this is written ELI ("E leads I, with L"). With a capacitor present, the peak current leads the peak voltage. The symbol for capacitance is C, giving ICE ("I leads E, with C"). To memorise chemical reactions, such as redox reactions, where it is common to mix up oxidation and reduction, the short phrase "LEO (Lose Electron Oxidation) the lion says GER (Gain Electron Reduction)" or "Oil Rig" can be used, the latter being an acronym for "Oxidation is losing, Reduction is gaining". John "Doc" Walters, who taught chemistry and physics at Browne & Nichols School in Cambridge, Massachusetts in the 1950s and 1960s, taught his students to use for this purpose the acronym RACOLA: Reduction is Addition of electrons and occurs at the Cathode; Oxidation is Loss of electrons and occurs at the Anode. To memorise the names of the planets and Pluto, use the planetary mnemonic: "My Very Educated Mother Just Served Us Nachos" or "My Very Easy Method Just Speeds Up Naming Planets" or "My Very Educated Mother Just Showed Us Nine Planets" or "Mother Visits Every Monday, Just Stays Until Noon, Period" - where each of the initial letters matches the name of the planets in our solar system (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, [Pluto]). To memorise the sequence of stellar classification: "Oh, Be A Fine Girl [or Guy], Kiss Me" – where O, B, A, F, G, K, M are categories of stars. To memorise the layers of the OSI Model: "Please Do Not Teach Students Pointless Acronyms" – with each of the initial letters matching the name of the OSI layers from bottom to top (physical, data link, network, transport, session, presentation, application). A taxonomy mnemonic is helpful for memorizing the scientific classification applied in taxonomy, such as "Do Kings Play Chess On Funny Glass Stairs?" or "Do Kindly Please Come Over For Green Soup" (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species). To memorise the diatomic elements: BrINClHOF(pronounced 'brinkelhoff') or "Have No Fear Of Ice Cold Beer." Opinion, Shape, Colour, Origin, and Material (OPSHACOM): adjectives order in English grammar. "Dash In A Real Rush! Hurry, Or Else Accident!" is a mnemonic for spelling 'diarrhoea". To memorize the part of the brain associated with memory, Herds of Animals Cause Panic. Hippocampus, Amygdala, Cerebellum, & Prefrontal Cortex. To