AT meaning in Messaging ?

Answer: What is All That mean?

All That is an American sketch comedy television series created by Brian Robbins and Mike Tollin. The series originally aired on Nickelodeon from April 16, 1994, to October 22, 2005, lasting ten seasons, and was produced by Tollin/Robbins Productions and by Schneider's Bakery in season ten. The pilot episode was originally shown as a special "sneak peek", with the show officially debuting as a regular series on April 16, 1994.

The series features original short comedic sketches and weekly musical guests aimed toward a young audience. Its sketches parody contemporary culture and are performed by a large and varying cast of child and teen actors. Early episodes were taped at Nickelodeon Studios at Universal Orlando Resort and then moved to Hollywood at the Nickelodeon on Sunset theatre, where other Nickelodeon shows such as The Amanda Show, Kenan & Kel, and Drake & Josh were filmed.

All That went on to become a fixture on Nickelodeon for over a decade, and has received acclaim for its diverse cast and impact on children's television. The series has spun off several members of the cast in their own Nickelodeon television series with varying levels of success. It has been marketed in other ways, including an audio recording, books, a feature film, festival tour, and numerous reunions and specials celebrating the legacy of All That.

In 2019, Robbins, the current president of Nickelodeon and co-creator of the original series, announced a revival of the series with original cast member Kenan Thompson serving as executive producer, with Kel Mitchell later confirmed in the same role. Original cast members Lori Beth Denberg and Josh Server also appeared in the premiere episode (which aired on June 15, 2019) with musical guests the Jonas Brothers.

reference

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Arabidopsis Thaliana	Academic & Science
Anearobic Tank	Academic & Science
Aerobic Tank	Academic & Science
Automatic Theodolite	Academic & Science
After Tax	Accounts and Finance
Automatic Transfer	Accounts and Finance
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Anti-Terrorism	Business
Alltel Corporation	Business
Assay Technologies	Business
Alpine Touring	Business
Adhesive Transfer	Business
Assistive Technology	Business
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Astatine	Chemistry
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Accessible Technology	Community
Adventure Time	Community
Advanced Technologies Intelligent Vision Conference	Community
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Asynchronous Terminal	Computer and Networking
Austria (TLD)	Computing
Attention To ....	Computing
Advance Technology	Computing
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Artfinity	Cryptocurrency
All Terrain	Earth Science
Arthur Tom	General
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Anti T	General
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Addis Tribune	General
Airtel Tanzania	General
Additive Templates	General
Tug (Auxiliary, Tug)	General
Awkward Turtle	General
Agreement Time	General
Aircraft Transport	Governmental
Aircraft Tools	Governmental
Appeal Tribunal	Governmental
Army Transformation	Governmental
Air Traffic	Governmental
Abnormal Tread wear	Governmental
Automatic Transmission	Governmental
Anti-Terrorist	Governmental
Atlanta Field Office	Governmental
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AntiThrombin	Governmental
Acquisitions Team	Governmental
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ASNOTI	Indian Railway Station
Advanced Technology	Information Technology
Active Terminator	Information Technology
Access Time	Information Technology
Alianza del Trabajo	International
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Altes Testament	International
Asociación Tikal	International
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Arhivele Totalitarismului, Bucureşti	International
Alternate Thread	Internet
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Affine Transform	Maths
Atrophic Thyroiditis	Medical
Autogenic Training	Medical
Autoimmune Thrombocytopenia	Medical
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Autologous Transfusion	Medical
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Animal Tusk	Medical
Acceleration Therapeutics	Medical
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Active Transport	Medical
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Achilles tendon	Medical
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Acute Thrombosis	Medical
Acute Tonsillitis	Medical
acyltransferase	Medical
Adenine-Thymine	Medical
Adenomatoid Tumour	Medical
Adoptive Transfer	Medical
Aerobic Training	Medical
Agglutination Test	Medical
Air Temperature	Medical
Air Trapping	Medical
Alopecia Totalis	Medical
Alternative Therapy	Medical
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angiotensin	Medical
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antitrypsin	Medical
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Anti-tank	Military and Defence
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Acceptance Testing	Space Science
All Times	Sports
Agent Team	Sports
Arranged Team	Sports
Athletic Trainer	Sports
American Trails	Sports
Asynchronous Transmission	Technology
Access Terminal	Telecommunication
Attention Command	Telecommunication