PHASES OF THE MOON
eight phases · a full cycle of 29.53 days
THE SOLAR SYSTEM
eight planets · size, distance, year and day
SIZE CHARTS
shoes, tops, bottoms — and a centimetre under every grid
SERUM ACTIVES
when to apply, what to keep apart in time, what the season changes
BITS, BYTES, KILOBYTES
two scales · 1000 and 1024 · why a drive looks smaller
FLOWCHART SYMBOLS
10 shapes, and one algorithm drawn with them
HTTP STATUS CODES
five classes · twenty codes you meet every day
NINE DRINKS
the same coffee, different proportions
ARABICA AND ROBUSTA
two species, six varieties, one difference
POST-FERMENTED TEAS
six teas changed by microbes rather than oxygen
MATCHA GRADES
ceremonial, premium, culinary — what is behind the words
PUERH AGEING
sheng and shu · what the years do and when to drink
BLACK TEA
grades, six leaves and four blends · in China it is "red tea"
GREEN TEA
six leaves · water, time, number of steepings
OOLONG
from 15 to 80 % oxidation · leaf shape · seven steepings
SIX KINDS OF TEA
one plant · the oxidation scale · seven processing steps
YELLOW TEA
yellowing under a cover · the step no other tea has
THE ISO 3591 GLASS
the only wine glass with dimensions instead of adjectives
PROTEIN IN FOODS
grams per 100 g · animal and plant · and the state each one was weighed in
ENGLISH ALPHABET
26 letters · 5 vowels · 21 consonants
GREEK ALPHABET
24 letters · names and where science uses them
NUMBERS 1 TO 100
the hundred chart · primes picked out in colour
MULTIPLICATION TABLE
1 to 12 · colour intensity = size of the product
ROMAN NUMERALS
seven symbols · ones, tens, hundreds · years