One might think black is black, but depending on the stock and total ink coverage it's often a dull gray.

A separation technique in which black ink is used to replace approximately equal amounts of cyan, magenta, and yellow ink in neutral tones, primarily in the shadows, so as to reduce the total ink coverage.

"TAC" was an abbreviation of Total Area Coverage in all three models.

DynaTAC was an abbreviation of "Dynamic Adaptive Total Area Coverage."

A 240m wide matrix of depth soundings at nominal 10m intervals is recorded on each survey run allowing total area coverage to be built up by overlapping survey runs.

Experiments with stocking densities indicate that the full diameter of the animal, including spines, must be considered when stocking with no more than 80% total area coverage (Alabi 2001).

It was during this time that Motorola developed a prototype, the DynaTAC (DYNamic Adaptive Total Area Coverage) portable phone.