1 Electronic Mail Messages transmitted between work stations over a network. Electronic Mail Public provided by a 3 rd party vendor.
Users connect across a public network.
Private integrated with user s computer. Owned and operated by a company for its own internal messaging requirements. Public systems you must pay for number and length of messages sent and stored. Private systems offer better integration with customer-owned systems, but public systems offer a wider range of delivery options and more users. Single- users of a shared computer system can exchange messages.