Dark Horse Comics — December 2006.
Translation: Frederik L. Schodt.
Ghost in the Shell 1.5: Human-Error Processor is a set of four chapters that were left out of the Ghost in the Shell 2: Man/Machine Interface by Masamune Shirow himself. The four chapters are: "Fat Cat", "Drive Slave", "Mines of Mind" and "Lost Past".
This is the first part of the second chapter in the series (Drive Slave).