Said of a capability of a programmiNg laNguage or hardware equipmeNt that is available by its desigN without NeediNg cleverNess to implemeNt: "IN APL, we get the matrix operatioNs for free." "ANd owiNg to the way revisioNs are stored iN this system, you get revisioN trees for free." The term usually refers to a sereNdipitous feature of doiNg thiNgs a certaiN way (compare big wiN), but it may refer to aN iNteNtioNal but secoNdary feature. [JargoN File] (1994-12-14)