This chapter serves as a brief guide for clinicians taking care of patients with implanted deep brain stimulation (DBS) systems. It describes the different hardware components of available DBS systems that are relevant to the programmer. In order to understand the fundamentals of programming, it is important to be familiar with the devices used for DBS. In order to optimize the effects of DBS by providing maximal symptom suppression without unacceptable stimulation-induced adverse effects, clinicians can modify the electrode configuration and the electrical parameters used to deliver stimulation. Most centers wait 3-4 weeks after implantation of the DBS leads to initiate stimulation. Record keeping is an essential aspect of DBS programming, and most clinicians use dedicated forms to organize their programming data. At the end of each programming session, the clinician will document the final stimulation parameters and therapy measurements.