Subcategories:
You can see the full category hierarchy on the Category Map.
| 
 | 
 | 
| ANGSTROM | A Nitpicking Grump's Seriously Teenchy Register Of Measurement | Tony McCoy O'Grady | 
| BOLT | Bit Of Lovely Tweed | Tony McCoy O'Grady | 
| CALORIE | Cannot Allow Living Off Rapturous Impulsive Eating | Rico Leffanta Food & Drink | 
| CALORIE (2) | Can A Living Organism Release Its Energy? | Angela Brett | 
| CANDELA | Calculating A Non-Dark (Electrically Lit?) Area | Tony McCoy O'Grady | 
| CAPACITIES | Cupful And Pint And CC, Intended To Itnternationalise Exact Standards | Tony McCoy O'Grady | 
| CORD (2) | Chopper Organises Ready Deadwood | Tony McCoy O'Grady | 
| COULOMB | Charge Of Umpteen Leptons, One Magnetism Below | Angela Brett (One Magnetism Below referring to the leptons in question having electromagnetic charge of -1) | 
| DECIBEL | Do Echoing Chords Injure Bandmembers' Eardrums, Lately? | Tony McCoy O'Grady | 
| DYNE | Do You Need Energy? | Tony McCoy O'Grady | 
| FOOT | Frequently, One Of Three | Tony McCoy O'Grady (The foot is usually overshadowed by the Yard, which is three foot long) | 
| GRAMME | Gravity 'Reaching At' Mass, Measures Everything | Tony McCoy O'Grady | 
| HENRY | Has Electricity Not Registered Yet? | Tony McCoy O'Grady | 
| HERTZ | Have Everything Recalibrated To Zero | Tony McCoy O'Grady | 
| HZ | Hearing Zone | Jan Morgan (Hz is usually short for Hertz) | 
| INCH | It's Not Considered Highbrow | Angela Brett | 
| KNOT (2) | Keeps Navigators On Target | Angela Brett | 
| LIGHT YEAR | Lightspeed Information Gets Here To Yonder Each Annual Rotation | Angela Brett | 
| MEASUREMENTS | Must Ensure Accurate Size Using Ruler - Errors Mean Everything's Now Too Short! | Angela Brett and Patricia Rix | 
| MEASUREMENTS (2) | Many Early Artisans Surely Used Reliably Established Methods - Eliminating Nasty Tradesmen's Scams | Tony McCoy O'Grady | 
| METRE | Measured Equator To Rotator's Extremities | Angela Brett (the metre was originally intended to be one ten millionth of the distance from pole to equator.) | 
| METRICS | Marking Each Thousandfold Range Is Convenient Symbol | Angela Brett | 
| METRICS (2) | Metre Equals Three Rather Inconsiderable Consecutive Steps | Patricia Rix | 
| METRICS (3) | Measuring Equipment That Reads In "Centi-" Scales | Tony McCoy O'Grady | 
| MILES (3) | Marching Imperial Legions Established Standard! | Tony McCoy O'Grady - The mile as a unit of length is of Roman military origin, being 1000 paces (a double step.... counting 1 every time the right foot hit the ground) History | 
| MOLE | Measurement Of Lumpiness, Evidently | Tony McCoy O'Grady | 
| MOLE (2) | Molecules Of Large Enumeration | Angela Brett | 
| NEWTON (5) | Normally Expresses What "Thump" Offers, Numerically | Tony McCoy O'Grady | 
| PASCAL | Pressure And Stress Calculations Are Lengthy | Tony McCoy O'Grady | 
| VALENTINE (4) | Venus And Lips Entangle Naturally To Indicate Numerical Expression | Tony McCoy O'Grady, proposing that the "Valentine" should be the SI unit of kisses. People & Relationships:Love & Lust | 
| YARDSTICK | Ye Auld Ruler... Do Stop Talking Imperial - Count Kilometres! | Angela Brett |