Generally speaking, entities where their professional administration teams need a *nix product with a strong reputation for dependability and the fall-back opti

Generally speaking, entities where their professional administration teams need a *nix product with a strong reputation for dependability and the fall-back option of a support contact for when things go pear-shaped. This is vaguely referred to as "The Enterprise," because they tend to be large, low risk organizations with high user counts. RedHat's userbase is basically the opposite side of the spectrum from Ubuntu users flying by the seat of their pants with that popular free server thingie they heard about.