Landmark Graphics Corporation

Landmark Graphics Corporation was created in Houston, Texas in 1982 by John Mouton, Andy Hildebrand, H. Roice Nelson, and Bob Limbaugh, to develop one of the first systems for interpreting 3D data from seismic surveys for the oil and gas industry. At first the company designed and built the 3D software and the workstations required to run it. However with the advent of cheap Unix-based workstations from other manufacturers over the next decade, it ported the software to their versions of Unix and dropped the hardware side of the business.