LAUNDRY CARE SYMBOLS
the 28 symbols of the everyday clothing tag per ISO 3758:2023: five treatments in a fixed order, sharing one set of modifiers
THE ASCII TABLE
all 128 positions: the column is the three high bits, the row is the four low ones
THE BASE32 ENCODING
forty bits to a quantum: five bytes, eight characters and five padding cases
THE BASE64 ENCODING
three bytes become four characters: the alphabet, the tail, and what the "=" at the end is for
HTTP METHODS · 2026
ten methods per RFC 9110, 5789 and 10008: which are safe, which are idempotent, which can be retried
SPECIAL-PURPOSE IPv4 BLOCKS
14 blocks that belong to no host on the internet — 13.8 % of the address space, of which exactly one eighth is multicast and reserved
KANBAN
the board, the limit on work in progress, and the four metrics that measure flow
SUBNET MASKS
from /0 to /32: the mask, how many addresses a block holds, and how many of them go to hosts
UML DIAGRAMS
the fourteen kinds, and the notation a class diagram is made of
PERCENT-ENCODING IN URIs
128 ASCII positions: 66 unreserved, 18 delimiters, 43 that must always be encoded — and the "%" itself
THE UTF-8 ENCODING
how a Unicode code point falls into one, two, three or four bytes — and which bytes never appear
VIM COMMANDS
modes, motions and editing per the Vim 9.1 help — and the grammar that composes them into commands
NINE DRINKS
the same coffee, different proportions
ESPRESSO
the nine requirements of a certified Italian espresso, with their tolerances
THE ISO 3591 GLASS
the only wine glass with dimensions instead of adjectives
HERBS AND SPICES
what pairs with what, how much to use and what swaps for what — per extension publications MF3539 (Kansas State) and FN198 (NDSU)
SAFE MEAT TEMPERATURES
USDA minimums inside the cut: three numbers for all meat, the rest time, and an oven plan
THE BRAILLE ALPHABET
63 characters of the cell in seven lines — 26 letters, the digits, the punctuation and 8 prefixes
BIT DEPTH
how many steps the level is cut into, what a bit adds, and why floating point is not the next row
CIRCLE OF FIFTHS
12 keys · key signatures · relative minors
DI, REAMP AND PREAMP
three boxes on one ruler of levels — where each one leads from and to
DRUM KIT NOTATION
where every drum and cymbal sits on the staff — per the Percussive Arts Society standard
THE PENTATONIC
three positions · the root is marked
LOUDNESS ON DELIVERY
integrated loudness, true peak and the room between them — from the documents, not from hearsay
THE STEREO FIELD
what stays centred · what is spread · why the low end is not panned
MUSICAL DYNAMICS
the loudness marks from pp to ff, crescendo and diminuendo hairpins — and how the piano got its name
NOTE FREQUENCIES
the fundamental of every note in hertz · equal temperament, A = 440 Hz
C MAJOR FINGERING
right and left · one octave and two
THE EIGHT BLOOD TYPES
three antigens, eight types — and the one rule the whole table of compatibility follows from
PHONETIC ALPHABET
the ICAO standard · for radio and telephone
FOOTBALL: THE BALL
Law 2, three codes of the game, five sizes and three FIFA quality marks — what a ball must survive
BISHOP
a diagonal at any distance — and the half of the board that will never come
KING
one square in any direction, from three in the corner to eight in the middle, and castling
THE MOVES OF THE PIECES
all six moves from one square, the article of the rules and how many squares each piece holds
QUEEN
file, rank and diagonal together — from twenty-one squares to twenty-seven
ROOK
fourteen squares from any square of the board — the one piece that does not care where it stands