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This lecture introduces electronic calculations based on transistors, starting from algorithms to create an abstract machine. It discusses the independence of technology for implementation, including electromechanical, electronic, and optical possibilities. The lecture covers the functioning of transistors as controlled switches, the low cost of transistors in modern processors, and the implementation of logical circuits. It also explores the construction of various logical circuits using transistors, such as inverters and AND gates. The lecture concludes by showcasing the capabilities of processors in performing complex functions through the addition of binary numbers.