A business jet, executive jet or private jet is a term that describes a jet aircraft, usually small in size, designed for the transportation of groups of businessmen or wealthy individuals. Business reactors can be adapted for other tasks, such as evacuating victims or delivering cargo, and some can be used by public agencies, governments or armed forces. Firms that build, sell, buy and lease these aircraft tend to use the more formal terms corporate jet, executive jet, VIP transport or business jet.