Electronic mail (e-mail) services over radio communications channels to users of radio so that e-mail can be generated by and received by those users to and from computer networks including the globally interconnected network known as the Internet; allocation and maintenance of electronic mail (e-mail) addresses for use on radio communications channels and computer networks; data communication and network services using radio systems; paging services using radio communications networks; electronic data information distribution services including message store and forward services using computer related communication systems; electronic mail services incorporating Global Positioning System (GPS) of the e-mail sender; rental of message sending, receiving and display apparatus