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The Visual Display of Quantitative Information

Edward Tufte

Recommended by 2 people on the record.

The bar next to each date shows how long ago it was said: 6d is days, 4yr is years.

Jeff Atwood recommends it
You don't need to own all four books in the series unless you're a completist (or a masochist, I suppose), but the first two are essential.

on blog.codinghorror.com · 2 Feb 2004

This book on rcmnd →

That little bar

It says how long ago something was said, so you can tell last month from 2014 without doing the arithmetic. Full and green is recent; it drains and cools as the date gets older, and empties completely at about 6 years.

A striped bar means the date itself is an estimate — the source did not carry an exact one. An entry with no date at all gets no bar.