The founder of electrical well logging, now the name for any electrical well log.

Schlumberger Limited is the world's largest oilfield services corporation operating in over 80 countries, with about 70,000 people of 140 nationalities. Schlumberger supplies a wide range of products and services from seismic acquisition and processing; formation evaluation; well testing and directional drilling to well cementing and stimulation; artificial lift and well completions; and consulting, software and information management.

a leading provider of end-to-end Campus ID solutions including system design, project management and implementation

a good Company but not a good employer