> the term kosher applies directly to food, not
> technology; this is a metaphor
Kosher means "fit for purpose" and is often used for items other than food. For one example, during the Sukot holiday it is customary to erect and eat in tents. Due to shody construction and safety issues, not to mention adherence to biblical prescription of certain tent features, there exist "kosher" tents which one can buy and know that it is fit for purpose.Source: דובר עברית