Final answer:
General Augustus Lane Fox Pitt Rivers is credited with pioneering systematic excavation techniques and careful recording, which greatly contributed to archaeology as a scientific discipline.
Step-by-step explanation:
The piece of technology first used by General Augustus Lane Fox Pitt Rivers for archaeological purposes was systematic excavation techniques with careful recording of information about locations and contexts of artifacts. He is often credited with the establishment of archaeology as a scientific discipline. Pitt Rivers applied a meticulous grid system to his excavations and insisted on the careful recording of the exact position and depth of each artifact. His approach marked a significant development in archaeological method and was essential in allowing future generations to reconstruct archaeological sites and understand the sequence of human activity within them. Although the question appears to refer to a specific technological tool, Pitt Rivers' most significant contribution was indeed his pioneering methodology which laid the foundations for archaeological techniques used today.