PHASES OF THE MOON
eight phases · a full cycle of 29.53 days
$1.50
SERUM ACTIVES
when to apply, what to keep apart in time, what the season changes
$1.50
BITS, BYTES, KILOBYTES
two scales · 1000 and 1024 · why a drive looks smaller
$1.50
HTTP STATUS CODES
five classes · twenty codes you meet every day
$1.50
ENGLISH ALPHABET
26 letters · 5 vowels · 21 consonants
$1.50
THE CLOCK FACE
two hands, twelve numbers — how to read the time
$1.50
PAPER SIZES
the A series · from A0 to A6
$1.50