all 128 positions: the column is the three high bits, the row is the four low ones
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
The column number and the row number together are the hexadecimal code: K sits at 4/11, that is 4B. The small number in the corner of a cell is the same code in decimal.
ISO 646 left twelve of the ninety-four graphic positions to each country. Two of them offered a choice — # or £, $ or ¤ — and ten more, @ [ \ ] ^ ` { | } ~, carried no assigned character at all.
The standard asked only that a country either put its own character there or declare the position unused. All twelve are filled in by the International Reference Version alone — and they are exactly the characters every programming language now leans on.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 11 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
ten tasks, the year of each, the system, the figure — and the human it was measured against
who published each standard, when, what it does to the sound, and how many bits per second it allows
forty bits to a quantum: five bytes, eight characters and five padding cases
three bytes become four characters: the alphabet, the tail, and what the "=" at the end is for