That is, a sigma-algebra is a Boolean algebra with all countable sups and infs. Stand-up paddleboards (SUPs), are steered with a singled bladed paddle. The US Coast Guard classifies SUPs as vessels, like canoes or kayaks. Both songs feature new vocals from Sups, S-Endz and Liana. If one sups with sorrow, one need not invite the world to see you eat. SUPs form part of the Touring Class.