Compendium
Compendium , noun
[Latin compendium that which is weighed, saved, or shortened, a short way, from compendere to weigh; com- + pendere to weigh. See Pension, and compare Compend.]
A brief compilation or composition, containing the principal heads, or general principles, of a larger work or system; an abridgment; an epitome; a compend; a condensed summary.
A short system or compendium of a science.