Technics

technics (noun)

"the doctrine of arts in general; such branches of learning as respect the arts" (Definitions.net).

"rules of field of knowledge: the science or rules of a field of knowledge, especially a technical one ( takes a singular or plural verb )" (Encarta.msn.com).

n.
     1. technics (used with a sing. or pl. verb) The theory, principles, or study of an art or a   process.
     2. technics (used with a pl. verb) Technical details, rules, or methods.
     3. Variant of technique.
adj.
     Technical.

[From Greek tekhnikos, of art, from tekhn, art; see technical.] (thefreedictionary.com)