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
QUOTING IN THE SHELL
29 characters named by the standard, 4 ways to take the meaning off them — and the 3 characters where double quotes stop
INSERTION SORT
the way cards are ordered in the hand · the trace of one real run
QUICKSORT
splitting around a pivot · the trace of one real run
TWO-CAMERA SPEAKER SETUP
the lighting triangle and where each of the 2 cameras stands · the floor plan from above
THREE-CAMERA SPEAKER SETUP
the lighting triangle and where each of the 3 cameras stands · the floor plan from above
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
COCKTAIL FORMULAS
five templates by ratio, not fixed recipes — millilitres straight from the official IBA recipes
NINE DRINKS
the same coffee, different proportions
HOW MUCH COFFEE TO WATER
six methods · weight, grind, time
ESPRESSO
the nine requirements of a certified Italian espresso, with their tolerances
MINIMUM MATURATION
how long each spirit must sit in the barrel before it may bear its name — fifteen legal minimums on one scale
THE ISO 3591 GLASS
the only wine glass with dimensions instead of adjectives
WINE TEMPERATURE
neither from the fridge nor from the room — not one of them