MEMS accelerometers were definitely a thing. But commercial, low-cost MEMS was not yet a thing at that time. Motorola was rolling out their first product arou

MEMS accelerometers were definitely a thing. But commercial, low-cost MEMS was not yet a thing at that time. Motorola was rolling out their first product around that time, which was derived from military-grade hardware. That was for automotive use (airbag sensor).