perl -pe"s/(.)/uc($1)/e" infile > outfile

[download]
or 
while (<>) {
   s/(.)/uc($1)/e;
   print;
}

[download]

Update: Oops, switch lc with uc.

In reply to Re: Changing the first word to uppercase by ikegami
in thread Changing the first word to uppercase by Anonymous Monk

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