Thomas L. Floyd has a Master's degree in Electrical Engineering (SMU) and Bachelor's degree in Electrical Engineering (UF). He has worked as a design engineer at Texas Instruments and senior engineer at Martin-Marietta (now Lockheed-Martin). In addition, he has five years' experience teaching and as department head of the Electrons Technology program at Valencia Community College, Orlando, FL, and five years teaching electronics technology at Mayland Community College, Spruce Pine, NC. Floyd has been writing textbooks in electronic technology since 1975 including Digital Fundamentals, Principles of Electric Circuits, Electronics Fundamentals, Electronic Devices, Electric Circuit Fundamentals, Digital Fundamentals: A Systems Approach, Digital Fundamentals with PLD Programming, Fundamentals of Analog Circuits: A Systems Approach, Science of Electronics: Digital, Analog Fundamentals, Basic Operational Amplifiers and Linear Integrated Circuits, DC/AC Fundamentals: A Systems Approach, and Renewable Energy Systems.