Complex sentence: The Toshiba Satellite 420CDS was a notebook designed and sold by Toshiba that came with the Windows Operating System, and was sold in the mid-to late 1990's as part of the Toshiba Satellite line.
Split into simpler sentences: The Toshiba Satellite 420CDS was a notebook designed and sold by Toshiba that came with the Windows Operating System. They were sold in the mid- 90's as part of the Toshiba Satellite line.