Electronic messaging

Electronic messaging may refer to:

One-to-one-communication

 * Instant message (on a computer network)
 * Personal message (on a computer network)
 * Text message (on a cellular phone network)
 * SMTP (on a computer network)
 * Email (on a computer Network)
 * Voicemail (using the PSTN)
 * Fax (using the PSTN)
 * Pager (using the PSTN)

One-to-many communication

 * Bulletin board system (on a computer network)
 * Internet forum (on a computer network)
 * Usenet newsgroup (on a computer network)