When we read emails or short message on our phone, we will often see some words such as FYI or LOL etc. Do you know their meanings, right? But some of the abbreviations we may not know or cannot remember clearly. Here is a list of English abbreviations which may be useful to you in the future when you want to check them.
  
   Numbers:
    &n"sp;   2 = to/too
　　2B or not 2B = To be or not to be
　　4 = for
　　4ever = forever
　A：
　　ASL = Age/Sex/Location
　　AFAIC = As Far As I’m Concerned
　　AFAIK = As Far As I Know
　　AFK = Away From Keyboard
　　AIAMU = And I’m A Monkey’s Uncle
　　AISI = As I See It
　　AKA = Also Known As
　　AMBW = All My Best Wishes
　　ANFAWFOWS = And Now For A Word Word From Our Web Sponsor
　　AOTS = All Of The Sudden
　　ASAFP = As Soon As "Friggin" Possible
　　ASAP = As Soon As Possible
　　ATST = At The Same Time
　　AWGTHTGTTA = Are We Going To Have To Go Through This Again
　　AWGTHTGTTSA = Are We Going To Have To Go Through This Sh Again
　　AYSOS = Are You Stupid Or Something
　　B：
　　B4 = Before
　　B4N = Bye For Now
　　BBFBBM = Body By Fisher, Brains by Mattel
　　BBIAB = Be Back In A Bit
　　BBIAF = Be Back In A Few
　　BBL = Be Back Later
　　BBN = Bye Bye Now
　　BCNU = Be Seein’ You
　　BF = Boyfriend
　　BFD = Big Fing Deal
　　BFN = Bye For Now
　　BHOF = Bald Headed Old Fart
　　BIF = Basis In Fact
　　BITD = Back In The Day
　　Biz = Business
　　BM = Byte Me
　　BMOTA = Byte Me On The Ass
　　BNF = Big Name Fan
　　BOHICA = Bend Over Here It Comes Again
　　BR = Bathroom
　　BRB = Be Right Back
　　BRT = Be Right There
　　BS = Big Smile
　　BT = Byte This
　　BTDT = Been There Done That
　　BTSOOM = Beats The Sh Out Of Me
　　BTW = By The Way
　　BTWBO = Be There With Bells On
　　BWDIK = But What Do I Know?
　　BWO = Black, White or Other
　　C：
　　Cam = Web Camera
　　CIAO = Goodbye (in Italian)
　　CID = Consider It Done
　　CIO = Check It Out
　　CIS = CompuServe Information Service
　　CMF = Count My Fingers
　　Cof$ = Church of Scientology
　　CRAFT = Can’t Remember A Fing Thing
　　CRAWS = Can’t Remember Anything Worth A Sh
　　CSL = Can’t Stop Laughing
　　CTC = Choaking The Chicken
　　CU = See You
　　CUL/CYL/CUL8R = See You Later
　　CWYL = Chat With You Later
　　CYA = Cover Your Ass
　　D：
　　DBEYR = Don’t Believe Everything You Read
　　DD = Due Diligence
　　DDD = Direct Distance Dial
　　DETI = Don’t Even Think It
　　DGT = Don’t Go There
　　DHYB = Don’t Hold Your Breath
　　DIIK = Damned If I Known
　　DILLIGAD = Do I Look Like I Give A d\amn
　　DILLIGAS = Do I Look Like I Give A Sh
　　DKDC = Don’t Know Don’t Care
　　DL = Download
　　DLTM = Don’t Lie To Me
　　DQYDJ = Don’t Quit You’re Day Job
　　DRIB = Don’t Read If Busy
　　DS = Dunce Smiley
　　DYSTSOTT = Did You See The Size Of That Thing
　　E：
　　EG = Evil Grin
　　EOM = End Of Message
　　ESO = Equipment Smarter than Operator
　　F：
　　F2F/FTF = Face To Face
　　FAQ = Frequently Asked Question
　　FBKS = Failure Between Keyboard and Seat
　　FE = For Example/Fatal Error
　　FF&PN = Fresh Fields And Pastures New
　　FOAF = Friend Of A Friend
　　FTASB = Faster Than A Speeding Bullet
　　FT = Faint
　　FTL = Faster Than Light
　　FTTB = For The Time Being
　　FUBAR = Fed Up Beyond All Recognition 　　FUD = (Spreading) Fear, Uncertainty, and Disinformation
　　FWIW = For What It’s Worth
　　FYA = For Your Amusement
　　FYI = For Your Information
　　FYM = For Your Misinformation
　　G：
　　G2G = Got To Go
　　G8T/GR8 = Great
　　GAL = Get A Life
　　GDGD = Good,Good
　　GF = girlfriend
　　GG = Good Game/Gotta Go
　　GIGO = Garbage In, Garbage Out
　　GIWIST = Gee, I Wish I’d Said That
　　GL = Good Luck
　　GLYASDI = God Loves You And So Do I
　　GMTA = Great Minds Think Alike
　　GNBLFY = Got Nothing But Love For You
　　GR&D = Grinning Running And Ducking
　　GRRRR = "Growling"
　　GSOAS = Go Sit On A Snake
　　GTG = Got To Go
　　GTGB = Got To Go, Bye
　　GTGP = Got To Go Pee
　　GTH = Go To Hell
　　GTSY = Glad To See Ya
　　GYPO = Get Your Pants OffBE A QUEEN.
　　H：
　　HAGO = H!ve A Good One
　　HAK = Hugs And Kisses
　　HB = Hurry Back
　　HD = Hold

HHO1/2K = Ha Ha, Only Half Kidding
　　HHOK = Ha Ha, Only Kidding
　　HIOOC = Help! I’m Out Of Coffee
　　Howz = How is
　　HTH = Hope This (That) Helps
　　HUA = Heads Up Ace
　　HUYA = Head Up You’re a
　　I：
　　IAC = In Any Case
　　IAE = In Any Event
　　IANAC = I Am Not A Crook
　　IANAL = I Am Not A Lawyer
　　IBT = In Between Technology
　　IBTD = I Beg To Differ
　　IC = I See/In Character
　　IDGAF = I Don’t Give A F
　　IDGI = I Don’t Get It
　　IDK = I Don’t Know
　　IDKY = I Don’t Know You
　　IDST = I Didn’t Say That
　　IDTS = I Don’t Think So
　　IFAB = I Found A Bug
　　IFU = I Fed Up
　　IGGP = I Gotta Go Pee
　　IIIO = Intel Inside, Idiot Outside
　　IIMAD = If It Makes An(y) Difference
　　IIRC = If I Remember Correctly
　　IIWM = If It Were Me
　　ILICISCOMK = I Laughed, I Cried, I Spat/Spilt Coffee/Crumbs/Coke On My Keyboard
　　ILY = I Love You
　　IMHO = In My Humble Opinion
　　IMNSHO = In My Not So Humble Opinion
　　IMO = In My Opinion
　　INMP = It’s Not My Problem
　　INPO = In No Particular Order
　　IOH = I’m Outta Here
　　IOW = In Other Words
　　IRL = In Real Life
　　ISS = I Said So
　　ITM = In The Money
　　IYKWIM = If You Know What I Mean
　　IYSS = If You Say So
　　J：
　　J/C = Just Checking
　　J/K = Just Kidding!
　　J/W = Just Wondering
　　JAFO = Just Another Fing Onlooker
　　K：
　　K/KK = OK/OK, OK
　　KFY = Kiss For You
　　KISS = Keep It Simple Stupid
　　KIT = Keep In Touch
　　KMA = Kiss My Ass
　　KWIM = Know What I Mean
　　KX = kiss
　　KYPO = Keep Your Pants On
　　L：
　　L8R = Later
　　LD = Long Distance
　　LDTTWA = Let’s Do The Time Warp Again
　　LLTA = Lots And Lots Of Thunderous Applause
　　LMAO = Laughing My Ass Off
　　LMK = Let Me Know
　　LOL = Laughing Out Loud/Lots Of Luck(Love)
　　LTIC = Laughing ’Til I Cry
　　LTNS = Long Time No See
　　LYL = Love Ya Lots
　　LYLAS = Love You Like A Sister
　　M：
　　M8T = Mate
　　MHOTY = My Hat’s Off To You
　　MM = Market Maker
　　MorF = Male or Female?
　　MOTD = Message Of The Day
　　MOTSS = Members Of The Same Sex
　　MTFBWY = May The Force Be With You
　　MWBRL = More Will Be Revealed Later
　　MYOB = Mind Your Own Business
　　N：
　　N = And/Know/Now
　　NAK = Nursing At Keyboard
　　NAZ = Name, Address, Zip (also means Nasdaq)
　　NBD = No Big Deal
　　NBIF = No Basis In Fact
　　NFI = No Fing Idea
　　NFW = No Fing Way
　　NIFOC = Nude In Front Of The Computer
　　NM = Never Mind
　　NMP = Not My Problem
　　NMU = Nothing Much You
　　NOYB = None Of Your Business
　　NP = No Problem
　　NQOCD = Not Quite Our Class Dear
　　NRG = Energy
　　NRN = No Reply Necessary
　　NYCFS = New York City Finger Saluet
　　O：
　　OAUS = On An Unrelated Subject
　　OBTW = Oh, By The Way
　　OIC = Oh, I See
　　OICU = Oh, I See You
　　OMDB = Over My Dead Body
　　OMG = Oh My God/Oh My Gosh
　　OMIK = Open Mouth, Insert Keyboard
　　ONNA = Oh No, Not Again
　　OOC = Out Of Character
　　OOTB = Out Of The Box/Out Of The Blue
　　OT = Off Topic
　　OTOH = On The Other Hand
　　OWTTE = Or Words To That Effect
　　OZ = stands for "Australia"
　　P：
　　PEBCAK = Problem Exists Between Chair And Keyboard
　　PEM = Privacy Enhanced Mail
　　Pic = Picture
　　PIMP = Peeing In My Pants
　　PITA = Pain In The Ass
　　PLS/PLZ = Please
　　PMFJI = Pardon Me For Jumping In
　　PO = Piss Off
　　POS = Parents Over Shoulder
　　POV = Point Of View
　　PPL = People
　　Pro = Professional
　　PS = By The Way/Photoshop
　　T：
　　TAH = Take A Hike
　　TANSTAAFL = There Ain’t No Such Thing As A Free Lunch
　　TARFU = Things Are Really Fed Up
　　TDTM = Talk Dirty To Me
　　TEOTWAWKI = The End Of The World As We Know It
　　TFN = Thanks For Nothin’
　　THX/TX/THKS = Thanks
　　TIA = Thanks In Advance
　　TIAIL = Think I Am In Love
　　TIC = Tongue In Cheek
　　TLA = Three Letter Acronym
　　TLGO = The List Goes On
　　TM = Trust Me
　　TMI = Too Much Information
　　TMTOWTDI = There’s More Than One Way To Do It
　　TPTB = The Powers That Be
　　TSR = Totally Stuck in RAM
　　TTFN = Ta Ta For Now
　　TTT = That’s The Ticket/To The Top
　　TTUL/TTYL = Talk To You Later
　　TWHAB = This Won’t Hurt A Bit
　　TY = Thank You
　　TYVM = Thank You Very Much
　　U：
　　U = You
　　UR = Your
　　U R = You are
　　unPC = unPolitically Correct
　　URYY4M = You Are Too Wise For Me
　　V：
　　VFM = Values For Money
　　VG = Very Good
　　W：
　　WAG = Wild Ass Guess
　　WAI = What An Idiot
　　WB = Welcome Back
　　WCA = Who Cares Anyway
　　WDYS = What Did You Say?
　　WDYT = What Do You Think?
　　WE = Whatever
　　WEG = Wicked Evil Grin
　　WG = Wicked Grin
　　WGAFF = Who Gives A Flying F
　　WIIFM = What’s In It For Me?
　　WIT = Wordsmith In Training
　　WITFITS = What in the F is this Sh
　　WOG = Wise Old Guy
　　Wot/Wut = What
　　WRT = With Respect To/With Regard To
　　WTF = What The F
　　WTG = Way To Go!
　　WTSDS = Where The Sun Don’t Shine
　　WYMM = Will You Marry Me
　　WYP = What’s Your Problem?
　　WYRN = What’s Your Real Name?
　　WYS = Whatever You Say
　　WYSIWYG = What You See Is What You Get
　　WYT = Whatever You Think
　　X：
　　X U = Kiss You
　　Y：
　　Y = Why
　　Ya = You
　　YA = Yet Another
　　YAFIYGI = You Asked For It You Got It
　　YDKM = You Don’t Know Me
　　Yep/Yup = Yes
　　YGBK = You Gotta Be Kiddin’
　　YMMV = Your Mileage May Vary
　　YNK =`You Never Know
　　YOYO = You’re On Your Own
　　YR = Yeah, Right
　　YSYD = Yeah, Sure You Do
　　YTTT = You Telling The Truth?
　　YYSSW = Yeah Yeah Sure Sure Whatever

Source : http://blog.renren.com/blog/223305114/407355226