One of the earliest computers that the late Steve Jobs and Steve Wozniak manufactured at Apple used a microprocessor from Delaware Valley-based MOS Technology Inc. of Norristown, Pa. "A microprocessor is a collection of transistors that performs digital operations and computation on an integrated circuit board," said Dennis Silage, a professor of electrical and computer engineering at Temple. Silage described the MOS Technology entrepreneurs as "a group of engineers that worked for Motorola in Arizona." The group was not satisfied, formed its own company and moved to Pennsylvania.