| Code | Description |
| a&s | All And Sundry |
| a/s | Age/Sex? |
| a/s/l | Age/Sex/Location? |
| A/S/L/P | Age/Sex/Location/Picture |
| a? | Eh? |
| a3 | Anytime, Anywhere, Anyplace |
| aaa | Any Advice Appreciated |
| AAF | As A Friend |
| AAK | Asleep At Keyboard |
| AAK | Asleep At Keyboard |
| aam | As A Matter Of Fact |
| aamof | As A Matter Of Fact |
| AAMOI | As A Matter Of Interest |
| AAR | At Any Rate |
| AAR8 | At Any Rate |
| AAS | Alive And Smiling |
| AATK | Always At The Keyboard |
| AAYF | As Always, Your Friend |
| AB | Ass Backwards |
| ABITHIWTIDB | A Bird In The Hand Is Worth Two In The Bush |
| AbsntMndd | Absentminded |
| Abt2 | About To |
| ACD | Alt Control Delete |
| ACE | Access Control Entry |
| ACK | Acknowledgement |
| activ8 | Activate |
| ActLIkUMEnIt | Act Like You Mean It |
| ActYaAgeNtYaShuSIz | Act Your Age Not Your Shoe Size |
| ADAD | Another Day Another Dollar |
| ADBB | All Done Bye Bye |
| ADctd2Luv | Addicted To Love |
| add | Address |
| adgr | All Donations Gratefully Received |
| ADIH | Another Day In Hell |
| ADIP | Another Day In Paradise |
| adn | Any Day Now |
| ADR | Address |
| adrs | Address |
| AEAP | As Early As Possible |
| AFAGAY | A Friend As Good As You |
| AFAHMASP | A Fool And His Money Are Soon Parted |
| afaiaa | As Far As I Am Aware |
| AFAIC | As Far As I'M Concerned |
| afaics | As Far As I Can See |
| afaict | As Far As I Can Tell |
| AFAIK | As Far As I Know |
| AFAIK | As Far As I Know |
| afair | As Far As I Remember As Far As I Recall |
| AFAIU | As Far As I Understand |
| afaiui | As Far As I Understand It |
| AFAP | As Far As Possible |
| afauc | As Far As You'Re Concerned |
| afayc | As Far As You'Re Concerned |
| AFC | Away From Computer |
| afda | A Few Days Ago |
| afdb | A Few Days Back |
| AFDN | Any F***Ing Day Now |
| AFGO | Another F***Ing Growth Opportunity |
| AFIAA | As Far As I Am Aware |
| AFINIAFI | A Friend In Need Is A Friend Indeed |
| AFK | Away From Keyboard -Or- A Free Kill |
| AFK | Away From Keyboard |
| AFPOE | A Fresh Pair Of Eyes |
| AFT | About F***Ing Time |
| AFZ | Acronym Free Zone |
| agin | Again |
| AGKWE | And God Knows What Else |
| AGTWHBA | A Good Time Was Had By All |
| AHzBEn | A Has-Been |
| AI! | As If! |
| AIAMU | And I'M A Monkey'S Uncle |
| aight | Alright |
| AIH | As It Happens |
| AIMB | As I Mentioned Before |
| AIMP | Always In My Prayers |
| air | As I Remember As I Recall |
| aisb | As I Said Before |
| AISE | As I Said Earlier |
| aisi | As I See It |
| aiUi | As I Understand It |
| aiw | As It Were As It Was |
| aka | Also Known As |
| AKA or a.k.a. | Also Known As |
| aL | All |
| al2gethr | Altogether |
| ALAP | As Late As Possible |
| Alcon | All Concerned |
| aliwanisu | All I Want Is You |
| ALOL | Actually Laughing Out Loud |
| ALOr0 | All Or Nothing |
| ALOTBSOL | Always Look On The Bright Side Of Life |
| ALrIt | All Right |
| ALTG | Act Locally, Think Globally |
| amap | As Much As Possible As Many As Possible |
| ambw | All My Best Wishes |
| AMF | Adios Muther F***Er |
| aml | All My Love |
| AML | All My Love |
| AMRMTYFTS | All My Roommates Thank You For The Show |
| AND | Any Day Now |
| ANFAWFOWS | And Now For A Word Word From Our Web Sponsor |
| ANFSCD | And Now For Something Completely Different |
| anytng | Anything |
| aoas | All Of A Sudden |
| AOB | Abuse Of Bandwidth |
| AON | Apropos Of Nothing |
| AP | Apple Pie |
| apac | All Praise And Credit |
| apyr | As Per Your Request |
| aQr8 | Accurate |
| AS | Ape Shit |
| ASAFP | As Soon As "Friggin" Possible |
| asap | As Soon As Possible |
| ASL | Age/Sex/Location |
| ASLMH | Age/Sex/Location/Music/Hobbies |
| asnmnt | Assignment |
| ATAB | Ain'T That A Bitch |
| ATB | All The Best |
| ATB | All The Best |
| atm | At The Moment |
| atst | At The Same Time |
| attn | Attention |
| attyob | Anything That Turns You On, Baby |
| ATW | All The Web Or Around The Web |
| auor | At Your Own Risk |
| av | Have |
| awcigo | And Where Can I Get One? |
| awgthtgtata | Are We Going To Have To Go Through All This Again? |
| awgthtgtta | Are We Going To Have To Go Through This Again? |
| AWGTHTGTTSA | Are We Going To Have To Go Through This Sh** Again |
| awhfy | Are We Having Fun Yet? |
| AWOL | Absent Without Leave |
| ay | Always Yours |
| AYC | Aren'T You Clever -Or- Aren'T You Cheeky |
| AYCE | All You Can Eat |
| AYK | As You Know |
| ayor | At Your Own Risk |
| aysos | Are You Stupid Or Something? |
| ayt | Are You There? |
| AYTMTB | And You'Re Telling Me This Because |