Maybe this is an odd question. It has always bugged me that computability problems are written in all caps, and in such an "awkward" way. SAT, 3-SAT, COLORING, 3-COLORING, PARTITION, CLIQUE, VERTEX COVER. Etc. They're not proper titles, just single words which don't mean much on their own.
Is there any reason for this terminology, especially the all caps part? Who started that terminology?