Subcategories:
You can see the full category hierarchy on the Category Map.
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| A AND A EQUALS B | Alphabetic Algebra Never Dies. Appealling Equations Quite Useful, Although Lacking Spelling Beauty. | 
                Tony McCoy O'Grady | 
| ABACUS | Abundant Beads, Addition & Calculation Utility System. | 
                Tony McCoy O'Grady | 
| ABACUS (2) | All Beads Are Calculated Using Slides | 
                Rico Leffanta | 
| ADDITION | Arithmetic Device Drummed Into Tots... It's Only Natural. | 
                Angela Brett | 
| ALGEBRA (2) | Abstract Logic Governs Everything - Broad-Ranging Applications. | 
                Angela Brett | 
| ALGEBRA (4) | Arithmetic Logically Grasps, Expressing Bounties: Representation Algebraic! | 
                Charles H. Montgomery, Jr. | 
| ALGEBRA (5) | Abstract Logic Generalises Everything; Beautiful Relationships Appear | 
                Angela Brett | 
| ALGEBRA (6) | Arithmetic Lovingly Grasps, Expressing Bounties: Representation Algebraic! | 
                Charles H. Montgomery, Jr. | 
| ALGEBRA (7) | Arithmetic Literally Generalized! Expressions Birth Real Abstraction/Adaptibility! | 
                Charles H. Montgomery, Jr. | 
| ARITHMETIC | A Really Irritating Task Humans Must Endure 'Til It Calculates. | 
                Timothy Chambers | 
| ARITHMETIC (3) | Adding Real Integers Together Has Made Everyone Think It's Complicated | 
                Angela Brett, when somebody mentioned the mnemonic 'A Red Indian Thought He Might Eat Toffee In Church', and noted that a politically correct version would spell anathematic. | 
| CALCULATOR | Complex And Liberating Creation - Users Lose Ability To Orchestrate Ratios | 
                Tony McCoy O'Grady Science:Electronics  | 
| CALCULATOR (2) | Challenged - Arithmetically Love Computing Using Least-Advanced, Typically Onmoney Reckoning! | 
                Charles H. Montgomery, Jr. Science:Electronics  | 
| CALCULATOR (3) | Children Always Love Computing Using Least-Advanced, Typically Onmoney Reckoning! | 
                Charles H. Montgomery, Jr. Science:Electronics  | 
| CALCULATOR (4) | Children Always Look Comfortable Using Least-Advanced, Typically Onmoney Reckoning! | 
                Charles H. Montgomery, Jr. Science:Electronics  | 
| CHAOS | Created Havoc Amongst Orthodox Scientists | 
                Angela Brett | 
| CHAOTIC | Can't Highly Accurately Observe These Iterative Creations. | 
                Angela Brett, after reading about the mathematical phenomenon chaos... it's all about sequences which seem totally random but are generated by a simple mathematical rule - however, slight changes in the starting values can drastically change the whole thing, so chaotic motion is still very difficult to predict. | 
| CODE (2) | Confusingly Ordered Diatribe, Enigma | 
                Gavin Lambert Communication  | 
| DECIMAL POINT | Dot Emphasising Change In Magnitude... Any Leftward Part's Obviously Integral, Nearby's Tenths. | 
                Angela Brett | 
| DETERMATHATIONS | Daily Explain/Energise/Engineer! Test/ Extend Reality! Multiply Algorithms / Tools Habile! Advance/Adapt! Transfinites: Infinities/Increasing/Infinitely, Observe Nuances! Sciences/Study! | 
                Charles H. Montgomery, Jr. Words & Wordplay:Made Up Words  | 
| EIGENVECTOR | Excess Instructions Generate Exhausting, Not-Very-Exciting Classes. Tedium Often Results. | 
                Angela Brett, while sitting through a lecture about eigenvalues and eigenvectors (a topic which everyone in the class had learnt about at least once) which was being taught agonisingly slowly. Education:Slow Teaching  | 
| ENCRYPTION | Each New Code Requires Your Powers To Interpret Others' Notes. | 
                Angela Brett Computers  | 
| HAM SANDWICH THEOREM | Here's A Mathematical Statement Anyone (Not Dealing With Integrals) Can Hungrily Test. Halve Exactly Outer Rolls, Even Meat. | 
                Angela Brett (From the Collins dictionary of Mathematics: ham sandwich theorem, n, a colourful name for the theorem that given three volumes in Euclidean three-space, there is at least one plane which simultaneously bisects the three volumes. As a consequence, any sandwich may be cut in such a way that the two pieces have equal amounts of filling and equal amounts of each slice of bread.) Food & Drink  | 
| INFINITY | Increment Numbers Forever - It's Nuts, I Tell You! | 
                Angela Brett | 
| INTEGRATION PROJECT | It's Not Too Easy Getting Result... Adding That Infinity Of Negligible Parts. Relying On Just Exhaustive Calculation's Terrible! | 
                Angela Brett, when somebody searched for that phrase on the Acronyms website. | 
| MATH | Much About Tedious Hypotheses | 
                PiMaster | 
| MATH (2) | Manna! Abstract/Apparent Truth Habitually/Healthfully! | 
                Charles H. Montgomery, Jr. | 
| MATHEMATICS | Methodology Attempting To Harmonise Equations, Many Apply Techniques In Calculus & Statistics. | 
                Angela Brett | 
| MATHEMATICS (3) | Meet Absolute Truth Here... Employ Minimal Assumptions To Imply Complicated Statements. | 
                Angela Brett | 
| MATHS | Models, Axioms, Theorems, Hypothetical Structures | 
                Angela Brett | 
| MATH THEM MATICS! | Multiply Access To Help! Training ==> Housing, Employment, Meals! Mobilise Addicts Thru Innovative Compassion! Soar! | 
                Charles H. Montgomery, Jr. | 
| MATH THEM MAT TICS | Motivate All Tots Humanely! Technical Humans Elevate Man! Math Advances Technology! Technologists: Invent Comforts Social! | 
                Charles H. Montgomery, Jr. | 
| MATH WHIZ! | Math's Acme, Traveling Higher! Wishes He'd Invented Zero! | 
                Charles H. Montgomery, Jr. Relaxing from TEDIOUS APRONYMISING! (after CIRCLE PERIMETER) | 
| MATH WIZ | Multiplications & Additions - This 'Hard Work' Is Zero | 
                Tony McCoy O'Grady | 
| ODDEST (2) | Often Directly Divisible, Excepting (Surely) Twos | 
                TMcCO'G | 
| PLUS | Positively Lonely Unary's Superfluous | 
                Angela Brett, as it is not usually necessary to indicate that a number is positive with a plus sign. | 
| POLAR | Position's Obvious... Length, Angle Required. | 
                Angela Brett, referring to polar coordinates. | 
| PRIME | Produce Right Integers Multiplying Eternity | 
                Charles H. Montgomery, Jr. | 
| PRIME POWERFUL NUMBERS! | Positive = Recursively Invoke (Multiplication * {Each Prime, One Withheld!} ^ Exponent). Represent Factorisation Uniquely, Luminescing Naturals Unlimited! "Mathematics By Expansion: Reduces Swiftly!" | 
                Charles H. Montgomery, Jr. In apronym, PRIME is a transitive verb. One Withheld! means that mathematicians do not define ONE as a PRIME, even though PRIME commonly means FIRST. ONE is called a UNIT. "Mathematics By Expansion: Reduces Swiftly!"  fractions. Fundamental Theorem of Arithmetic  n.  Every natural number is either prime or may be decomposed uniquely into prime factors.  | 
| PRIMES | Positively Represent Individuals! Multiply Essential Services! | 
                Charles H. Montgomery, Jr. | 
| PRIMES (2) | Positives: Represented Integers. Multiplications Essentially Singular! | 
                Charles H. Montgomery, Jr. | 
| RABAT | Rotate And Bring About Togetherness | 
                Tony McCoy O'Grady | 
| ROOT | Radical, Or Originating Thing | 
                Tony McCoy O'Grady Assorted Nouns  | 
| SEQUENCE | Some Expect Quite Unremarkable Ending - Numbers Converging Evenly. | 
                Angela Brett | 
| SEQUENCE (2) | Sometimes Especially Queer Unruly Entity Named Chaos Emerges. | 
                Angela Brett | 
| SINE | Side Is Numerically Expressed | 
                Tony McCoy O'Grady | 
| SINE (2) | Symmetry Is Not Even | 
                Angela Brett | 
| SLOPE | Slanted Lines Offer Plainest Equations | 
                Angela Brett | 
| SLOPE (2) | Straight Lines Observed? Proportional Elements. | 
                Angela Brett | 
| THIRTY = FRIENDS! | Thirty (Halves {Initial = Remotest - Two} Year) = Four (Regeneration Increases!) + Eleven + Nine Down + Six! | 
                Charles H. Montgomery, Jr. Sum 30-Day Month Numbers: 4(April)+6(June)+9(September)+11(November)=10+20=30 (!) One of my original discoveries when I was less than 45. (Halves {Initial = Remotest - Two} Year): First Half of Year ==>(Initial=4) = (Remotest=6) - 2. Last Half of Year ==>(Initial=9) = (Remotest=11) - 2."Four (Regeneration Increases!) Spring starts late in Three (21 March 2003 in N. Hemisphere)."   "Nine\Down\ Down!=Fall! in September." Time  | 
| TABLES | Truth Arrays... Boolean Logic Explicitly Stated | 
                Angela Brett, referring to truth tables. Science:Electronics  | 
| ZIP (3) | Zero Incrementation Power | 
                Charles H. Montgomery, Jr. |