Quantum computing is an emerging technology that promises to provide computing power that can revolutionize society. In the past decade, more and more tech companies have invested in quantum computing and dozens of startups have been founded. In addition, the US government has started the National Quantum Initiative to spearhead research in quantum science and technology. What's all this buzz about? What allows quantum computers to outperform their classical counterparts? How does one actually build a quantum computer? We will explore the answers to these questions and more in this broad introduction to the field, covering both theory and physical implementations of a quantum computer.