A pistol can be either an automatic or a revolver, but automatic and revolver are not synonymous. A revolver has a revolving cylinder that holds the cartridges, an automatic does not.

Prison is a generic term that may be applied to the maximum security institutions often known as penitentiaries and to the medium security facilities often called correctional institutions or reformatories. All such facilities confine persons serving sentences for felonies.A jail is a facility normally used to confine persons serving sentences for misdemeanors, persons awaiting trial or sentencing on either felony or misdemeanor charges, and persons confined for civil matters such as failure to pay alimony and other types of contempt of court.