For Handheld, ruggedness runs deep. It’s what we stand for — our core value. From a user perspective, ruggedness describes a computer’s ability to operate in any type of exposed working condition, not just for a single use, but for three to five years of its life expectancy. Depending upon the type of work performed, however, what is rugged for one user may not be rugged for another. Ruggedness is defined by testing environmental specifications. The three most common tests are for temperature range, military standards (MIL-STD) and IP rating.