The DiSC model describes four main styles: D, i, S, and C. D is for Dominance, i is for Influence, S is for Steadiness, and C is for Conscientiousness. Everyone is a mixture of each style, but most people tend to fall into one or two main DiSC style quadrants.
People whose DiSC assessment scores put them close to other styles can show aspects of multiple styles in their personalities. This expands the styles to a total of 12 distinct personality types: DC, D, Di, iD, i, iS, Si, S, SC, CS, C, and CD.