Cola by citric or other isolated acids. Coca-Cola's recipe is maintained as a corporate trade secret. A variety of different sweeteners may be added to cola, often partly dependent on local agricultural policy. High-fructose corn syrup (HFCS) is predominantly used in the United States and Canada due to the lower cost of government-subsidized corn. In Europe, however, HFCS is subject to production quotas designed to encourage the production of sugar; sugar is thus typically used to sweeten sodas. In addition, stevia or an artificial sweetener may be used; "sugar-free" or "diet" colas typically contain artificial sweeteners only. In the 1940s, Coca-Cola
COLA (software architecture) ability to mutate the COLA into another (perhaps custom) language. A completely COLA-based computer system, whilst capable of implementing the operating system, libraries, applications and other levels of a traditional computer system, allows these distinctions to blur or disappear if the end-user wishes. Every aspect of the computer system, since it is written in a COLA (including the COLA itself), can be overridden, mutated, bypassed, etc. just as the local datastructures and functions in a traditional program can. There is also flexibility in how code is run, since there is a choice of interpreting, static compilation, dynamic compilation, in fact