Introductory article by Ralph Griswold on number drafting, a method of generating weaving designs from the digits of numbers, in contrast to the code tables used in name drafting. It explains how digits map to shafts or treadles, how 1-adjustment works, and how base conversion (for example base 8 or 16) adapts a number to the available shafts. A worked example, the number 3^77, is shown as a draft with a tabby tie-up. It closes with resources for base conversion and previews later parts on fractions and irrational numbers.