IOTA runs on subnet 9, and iota is the ninth letter of the Greek alphabet. Five ways to let the letter mark the SDK, in the W(e)ave palette and type. Each shown large on charcoal, then small on bone with an icon.
A lowercase iota in Garamond stands where a mark would. Iota has no dot; the SDK's one saffron point sits above it, so the work in motion is what turns ι into i.
The first letter of the wordmark is the Greek one. The serif iota with its small foot sits among tracked capitals, so the name carries its own origin. Reads as IOTA at a glance, and as something stranger the second time.
The wordmark stays exactly as the system has it. One saffron point rides above the I and nowhere else. The quietest option: no Greek on the page, and the story is told only when someone asks why the I is lit.
Nine strokes the height of a capital; the ninth is the I and the only one lit. The strokes are threads before they are a letter. It says "ninth" without a numeral, and it shortens to the strokes alone as an icon.
IOTA SDK in full on pages; ι wherever the SDK is small or written by hand: the package icon, the terminal prompt, the badge on a run. The wordmark keeps the name, the letter becomes what builders see while they work.
Greek capital Ι and Latin I look identical in Montserrat, so the iota only shows through the lowercase form, the lit point or the count. In Greek numerals iota stands for 10; say "the ninth letter", never "iota means nine". The name on PyPI: iota-sdk is the IOTA Foundation's package, so the install name still has to be settled separately.