SLB may refer to: Sustainability-linked bonds Single letter beacon, radio transmissions of a single repeating Morse code letter S.L. Benfica, a Portuguese sports club based in Lisbon SLB Radio Productions, Inc., producers of radio program The Saturday Light Brigade SLB, the trade name and ticker symbol of Schlumberger Limited, an energy services company Scytalidopepsin B, a proteolytic enzyme Sigma Lambda Beta, US fraternity Slide-lid box for cabinet selection cigars Sport Laulara e Benfica, an East Timorese football team Storm Lake Municipal Airport, Iowa, US, IATA code Strongside linebacker in American and Canadian football Supported lipid bilayers Swedish Friesian or Svensk Låglandsboskap, a Swedish breed of dairy cattle Server Load Balancer, Cloud Computing Term, see Load Balancing