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There are any number of ways for characterizing displays. One method for characterizing military displays is to look at categories defined by mission and/or the operational conditions of those missions. This can then be followed by looking more specifically at groups, which is the system type or functional use. Further characterization is provided according to designation by display active area, whether direct or indirect (virtual) view, head up or head down, or high or low information content, and design class. These terms are defined and explained below.
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