In contrast to division of work, division of labour is the specialization of an individual workers' or organizations' skills, through education, training, and practice.
AR15 Trigger Upgrades. 1  The trigger is one of the most crucial elements in achieving the highest level of accuracy from any firearm. Installation of a quality trigger will permit a light pull with little or no creep and overtravel.
by T. Keith Marshall. ARPA is an acronym for Automatic Radar Plotting Aid. It is a sophisticated piece of navigation equipment found on the bridge of most ocean-going vessels that combines a traditional radar display with a computer driven plotting device.