Complex sentence: Some former Tektronix employees left to create other successful Silicon Forest spin-off companies, including Mentor Graphics, Planar Systems, Floating Point Systems, Merix Corporation and Anthro Corporation.
Split into simpler sentences: Some former Tektronix employees left to create other successful Silicon Forest companies. Spin-offs include Mentor Graphics, Planar Systems, Floating Point Systems, Merix Corporation, and Anthro Corporation.