sentences:  In 1987, IEEE introduced IEEE 488.2-1987 specification ""Standard Codes, Formats, Protocols, and Common Commands"", it was later revised in 1992 as IEEE 488.2-1992.While IEEE 488.2 provided a device-independent syntax, there was still no standard for instrument-specific commands.Commands to control the same class of instrument, e.g., multimeters, would vary between manufacturers and even models.