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End of message or EOM (as in "(EOM)" or "") signifies the end of a message, often an
e-mail Electronic mail (usually shortened to email; alternatively hyphenated e-mail) is a method of transmitting and receiving Digital media, digital messages using electronics, electronic devices over a computer network. It was conceived in the ...
message.
Lifehacker ''Lifehacker'' is a weblog about life hacks and software that launched on 31 January 2005. The site was originally launched by Gawker Media and is owned by Ziff Davis. The blog posts cover a wide range of topics including Microsoft Windows, M ...

How "EOM" Makes Your Email More Efficient
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Usage

The subject of an e-mail message may contain such an abbreviation to signify that all content is in the subject line so that the message itself does not need to be opened (e.g., "No classes Monday (EOM)" or "Midterm delayed "). This practice can save the time of the receiver and has been recommended to increase productivity. EOM can also be used in conjunction with ''no reply necessary'', or NRN, to signify that the sender does not require (or would prefer not to receive) a response (e.g., "Campaign has launched (EOM/NRN)") or ''reply requested'' or RR to signify that the sender wishes a response (e.g., "Got a minute? (EOM/RR)"). These are examples of Internet slang. EOM is often used this way, as a synonym to NRN, in
blog A blog (a Clipping (morphology), truncation of "weblog") is an informational website consisting of discrete, often informal diary-style text entries also known as posts. Posts are typically displayed in Reverse chronology, reverse chronologic ...
s and forums online. It is often a snide way for commenters to imply that their message is so perfect that there can be no logical response to it. Or it can be used as a way of telling another specific poster to stop writing back. EOM can also be defined as the final 3 buzzes of an alert of the
Emergency Alert System The Emergency Alert System (EAS) is a Emergency population warning, national warning system in the United States designed to allow authorized officials to broadcast emergency alerts and warning messages to the public via Cable television, cable ...
to know when the alert is finished.


Origin

In earlier communications methods, an ''end of message'' ("EOM") sequence of characters indicated to a receiving device or operator that the current message has ended. In
teleprinter A teleprinter (teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point (telecommunications), point-to-point and point- ...
systems, the sequence "NNNN", on a line by itself, is an end of message indicator. In several
Morse code Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code i ...
conventions, including
amateur radio Amateur radio, also known as ham radio, is the use of the radio frequency radio spectrum, spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emer ...
, the
prosign Procedural signs or prosigns are shorthand signals used in Morse code telegraphy, for the purpose of simplifying and standardizing procedural protocols for landline and radio communication. The procedural signs are distinct from conventional Morse ...
AR (dit dah dit dah dit) means end of message. In the original
ASCII ASCII ( ), an acronym for American Standard Code for Information Interchange, is a character encoding standard for representing a particular set of 95 (English language focused) printable character, printable and 33 control character, control c ...
code, "EOM" corresponded to code 03 hex, which has since been renamed to "ETX" ("end of text").Korpela, Jukka (2004-04-20). Ascii control codes (control characters, C0 controls). Retrieved on 2012-08-14 from https://jkorpela.fi/chars/c0.html.


See also

* EOM (disambiguation) *
End-of-file In computing, end-of-file (EOF) is a condition in a computer operating system where no more data can be read from a data source. The data source is usually called a file or stream. Details In the C standard library, the character-reading functi ...
, also abbreviated EOF * List of computing and IT abbreviations * -30-


References

Communication Email {{Internet-stub