Luminosity class 0 or Ia + is used
for hypergiants, class I for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main - sequence stars, class sd (or VI) for sub-dwarfs, and class D (or VII) for white dwarfs.
Lamm co-founded Austin - based
Hypergiant to fashion that future by working with Fortune 500 companies to create products
for the artificial intelligence marketplace.