This paper discusses pulsar electrodynamics, focusing on the magnetospheric current system and the formation of field-aligned electric fields. It emphasizes the role of the wind activity in inducing a loop current system in the magnetosphere. The paper also addresses the formation of the outer gap and the interaction between the inner and outer magnetospheres. It discusses the nature of the pulsar wind, the electric current in the magnetosphere, and the constraints on the inner magnetosphere. The paper also presents models of the outer gap and the inner magnetosphere, including the effects of pair creation and external current sources. It concludes that the inner magnetosphere reacts to the imposed current in various ways depending on current direction, current density, field geometry, and external particle flux. The accelerators can appear at various altitudes, so there is no clear discrimination between the outer gap and the polar gap. The paper suggests that future research should focus on developing more accurate local models of the field-aligned accelerators to predict the properties of high-energy emission and interpret detailed observations giving phase-resolved energy spectra.This paper discusses pulsar electrodynamics, focusing on the magnetospheric current system and the formation of field-aligned electric fields. It emphasizes the role of the wind activity in inducing a loop current system in the magnetosphere. The paper also addresses the formation of the outer gap and the interaction between the inner and outer magnetospheres. It discusses the nature of the pulsar wind, the electric current in the magnetosphere, and the constraints on the inner magnetosphere. The paper also presents models of the outer gap and the inner magnetosphere, including the effects of pair creation and external current sources. It concludes that the inner magnetosphere reacts to the imposed current in various ways depending on current direction, current density, field geometry, and external particle flux. The accelerators can appear at various altitudes, so there is no clear discrimination between the outer gap and the polar gap. The paper suggests that future research should focus on developing more accurate local models of the field-aligned accelerators to predict the properties of high-energy emission and interpret detailed observations giving phase-resolved energy spectra.