SCPI (Standard Commands for Programmable Instruments) is a standardized set of text-based commands used to remotely control programmable test and measurement instruments. It defines the syntax and semantics that a controller must use to communicate with the instrument. This manual is an overview of SCPI and shows how SCPI is used in Pendulum CNT-104S instrument. SCPI is based on IEEE-488.2 to which it owes much of its structure and syntax.