M.A.S.K.

M.A.S.K. is a division of the United States military.

Project Predacon
M.A.S.K. developed an "experimental, all-terrain, expeditionary fighting vehicle". This vehicle was brought to Optimus Prime so he could scan a new alternate mode.

Transformers: Robots in Disguise
By the time that Bumblebee returned to Earth, the vehicle had made its way into mass production.