High Quality Content by WIKIPEDIA articles! Valid Logic Systems was one of the first commercial EDA electronic design automation companies. It was founded in the early 1980s, along with Daisy Systems Corporation and Mentor Graphics, collectively known as DMV. Initially, Valid built both hardware and software, for schematic capture, logic simulation, static timing analysis, and packaging. Much of the initial software base derived from SCALD ("Structured Computer-Aided Logic Design"), a set of tools developed to support the design of the S-1 supercomputer at Lawrence Livermore National Laboratories. Later, Valid expanded into IC design tools and into printed circuit board layout.

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