Nuclear magnetic resonance (NMR) was the first testbed system in which many of the fundamental ideas of QIP were physically implemented, such as error correction, teleportation, and benchmarking of quantum control with non-trivial numbers of qubits (recently up to 12). The "language" of NMR QIP, which translates quantum algorithms into RF pulses and spin evolutions, can be applied in some analogous form to nearly every potential implementation, and therefore provides a useful conceptual basis for understanding QIP experiments in a wide variety of systems. I will provide an introduction to both NMR and NMR QIP, from the rotating frame and concept of resonance, to implementation of simple algorithms such as Deutsch-Jozsa.