Toffoli gates are all you need

This article discusses Toffoli gates and their role in reversible computing, starting with Landauer's principle on energy limits for erasing bits. It explains how reversible circuits can be more energy-efficient despite not reaching theoretical limits. The Toffoli gate is defined as a reversible three-bit gate that flips the third bit if the first two are ones. The article demonstrates how any Boolean function can be computed using only Toffoli gates by constructing a NAND gate from them, highlighting the trade-off of needing extra input and output bits. This is relevant to IT/technology topics like computer architecture, logic circuits, and energy-efficient computing.