V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

TMTOWTDI
       There's More Than One Way To Do It (slang, PERL)


The Jargon File (version 4.4.7, 29 Dec 2003):

TMTOWTDI
 /tim?toh'?dee/, abbrev.

    There's More Than One Way To Do It. This abbreviation of the official motto
    of Perl is frequently used on newsgroups and mailing lists related to
    that language.