OP meaning in Messaging ?

Answer: What is Original Poster mean?

An Internet forum, or message board, is an online discussion site where people can hold conversations in the form of posted messages. They differ from chat rooms in that messages are often longer than one line of text, and are at least temporarily archived. Also, depending on the access level of a user or the forum set-up, a posted message might need to be approved by a moderator before it becomes publicly visible.

Forums have a specific set of jargon associated with them; example: a single conversation is called a "thread", or topic.

A discussion forum is hierarchical or tree-like in structure: a forum can contain a number of subforums, each of which may have several topics. Within a forum's topic, each new discussion started is called a thread and can be replied to by as many people as so wish.

Depending on the forum's settings, users can be anonymous or have to register with the forum and then subsequently log in to post messages. On most forums, users do not have to log in to read existing messages.

reference

Full Form	Category
Object of Preposition	Academic & Science
Open Pollinated	Academic & Science
Original Pronunciation	Academic & Science
Order in probability	Academic & Science
Oratory Prep	Academic & Science
Optimum Price	Accounts and Finance
Opposite Prompt	Arts
Office Products	Business
Order Party	Business
Outside Partner	Business
Oil Pan	Business
Occupancy Permit	Business
On Plan	Business
Operational Planning	Business
OsuusPankki	Business
oborový podnik	Business
Osmotic Pressure	Chemistry
Organo-phosphate	Chemistry
Oxidative Phosphorylation	Chemistry
Order of Preachers	Community
Out of Print	Community
Orthographic Projection	Community
OverProof	Community
Ontario Public	Community
Off Premises	Community
Overton Park, Memphis, Tennessee	Community
Organic Percussion	Community
On point	Community
One Power	Community
Open Platform	Computer Hardware
Open Plug	Computer Hardware
Operating Player	Computer Technology
Out of Place	Computing
Operator Panel	Computing
Outline Processor	Computing
Original Post/Poster	Computing
Original Post	Computing
Octave Plateau	Electronics
Optional Procedure Mailing System	General
Oceanic Plagiogranites	General
Occasional Paper	General
Operator Produksi	General
Orange Pekoe	General
Obnoxious Preppie	General
Optimus Prime	General
Opaque	General
Oxycontin Purdue	General
Owner Pays	General
O2 Page	General
Ocean Pacific	General
Operative Paragraph	General
Opening Post	General
One Piece	General
Oral Presentation	General
Outstanding Performer	General
Orange Potatoes	General
Observation Point	Governmental
Old Prison	Governmental
Official Publication	Governmental
Office of Preference	Governmental
Obras Publicas	International
Operationssaal	International
Operationsverstärker	International
Over Powerfull	Internet
Other People's	Internet
Original poster / Operator / Outpost / Overpowered	Internet Slang
Official Photographer	Jobs
Open Palm	Medical
OsteoPorosis	Medical
OroPharynx	Medical
occipitoparietal	Medical
Occlusal Plane	Medical
oesophagopharyngeal	Medical
Off Pump	Medical
Occiput Posterior	Medical
Out-Patient	Medical
Olfactory Pit	Medical
Oncotic Pressure	Medical
Operative Procedure	Medical
opium	Medical
Opponens Pollicis	Medical
Organising Pneumonia	Medical
On Program	Medical
OroPharyngeal	Medical
osteopaenia	Medical
osteopontin	Medical
Octo Pest	Messaging
Original Poster	Messaging
Operating Plan	Military and Defence
Off-base Privileges	Military and Defence
Operational Publication	Military and Defence
Ordnance Publication	Military and Defence
Observation Post	Military and Defence
Office of Protector	Military and Defence
Overall Position	Military and Defence
Opportunity Profile	Military and Defence
Optimistic Protocols	Networking
Opening Pressure	Physics Related
Over-powered	Radio Science
Overland Park, Kansas	Regional
Overland Park	Regional
Ordo Praedicatorum	Society & Culture
Open	Space Science
Operate	Space Science
Operation	Space Science
Oxygen Purge	Space Science
Open Position	Sports