A form of digital media on a plastic disc read by a laser in a CD drive. It comes in several varieties including CD-ROM, CD-R, and CD-RW.

(mathematics) Any topological subset of Euclidean space that is a compact set

plural of compact space

(topology, of a space) In which has every open cover has a finite subcover / (mathematics, of a morphism) Having open affine subschemes

(US) Any of several agreements, comparable to treaties, between states of the United States

plural of interstate compact

plural of compact neighborhood

plural of compact neighbourhood

plural of compact disc

plural of compact disk