The personal-computer giant Jack Tramiel built — "computers for the masses, not the classes." HQ West Chester, PA. Made the Commodore PET (1977, one of the founding trinity of home computers with the Apple II and TRS-80), the VIC-20, and the Commodore 64 — the best-selling single computer model ever (~12.5M+ units), on the MOS Technology 6502 (its own PA chip division). Acquired Amiga in 1984. Overlooked read: the best-selling PC in history came out of suburban Philadelphia, not Silicon Valley. Defunct 1994.

Red Metals is a next-generation domestic copper manufacturer building a new US supply chain for finished copper products, converting domestic copper feedstocks to finished rod faster and cleaner than traditional methods. The company established its first manufacturing operation in Charleston County, South Carolina, announced in June 2026.