Abbreviations and Specific Names. Abbreviations and acronyms based on proper nouns should be written in all capital letters. In most cases, derivative words do not need to be capitalized. This applies to terms based on a professionalâs surname that are used in a general sense today.
Length times width times depth (L x W x D) measures cubic feet and must be measured in feet.
Dimensions are what we measure size in. The first is length/height,  the second is width/breadth, the third is depth and the fourth is  time. Movies have three dimensions which are length, width and  time. A picture has only two and a line on paper supposedly has one  and real life has all four.