<P> Symbols sometimes change to reflect mergers . Prior to the 1999 merger with Mobil Oil, Exxon used a phonetic spelling of the company "XON" as its ticker symbol . The symbol of the firm after the merger was "XOM". After Hewlett - Packard merged with Compaq, the new firm took on the ticker symbol "HPQ". (The former symbols were HWP and CPQ .) AT&T's ticker symbol is simply "T"; accordingly, the company is referred to simply as "Telephone" on Wall Street (the T symbol is so well known that when the company was purchased by SBC, it took the AT&T name, capitalizing on its history and keeping the desired single letter symbol). </P> <P> Some examples of US Stock symbols include: </P> <Ul> <Li> A--Agilent Technologies </Li> <Li> AAPL--Apple Inc . </Li> <Li> BRK. A--Berkshire Hathaway (class A shares) </Li> <Li> C--Citigroup </Li> <Li> GOOG--Alphabet Inc . </Li> <Li> HOG--Harley - Davidson Inc . </Li> <Li> HPQ--Hewlett - Packard </Li> <Li> INTC--Intel </Li> <Li> KO--The Coca - Cola Company </Li> <Li> LUV - Southwest Airlines (after their main hub at Love Field) </Li> <Li> MMM--Minnesota Mining and Manufacturing (3M) </Li> <Li> MSFT--Microsoft </Li> <Li> T - AT&T </Li> <Li> TGT--Target Corporation </Li> <Li> TXN--Texas Instruments </Li> <Li> WMT--Walmart </Li> </Ul> <Li> A--Agilent Technologies </Li>

Which company's ticker symbol in nyse is 'c'