I have been using Perl since 1991, in the days when Larry Wall used to answer questions on the NNTP Perl newsgroup himself, and was soon using it for anything more than half a dozen lines of Bourne shell. Since then, I have used it for more than thirty major projects, the largest being over 40,000 lines of Perl code.
Parliamentary assembly of the Council of Europe, Strasbourg
Between 2003 and 2004, I undertook a big Perl project for the Parliamentary Assembly of the Council of Europe, in Strasbourg. This consisted of two parts: (a) the Annuaire system and (b) the Table Office system.
Together, the two systems comprised over 40,000 lines of Perl code together with over 20,000 lines of HTML templates and involved the conversion, cleansing and migration of more than 50 years of legacy data, on a variety of storage media in a variety of formats.
Hansard, House of Commons
Between 1991 and 1998, I used Perl for a number of projects at the House of Commons when I was computerizing the production of "Hansard" the Official Report of the debates in Parliament, leading to the first publication of Hansard on the Web.