An improvement to electronic displays of information in public places such as transportation terminals and retail stores. The system includes combinations of fixed display screens as well as personal devices such as portable computers communicating via radio networks and portable telephones communicating via telephone messaging protocols. The radio broadcasts to portable computers and telephones are tailored to the specific location, either the entire public facility or some sub-portion of the facility. When sub-portions of the facility receive different radio communications directed to wireless computers and mobile telephones, the fixed display screens in sub-locations also receive customized content particular to the sub-location.