Show Your Irish Perfins!

DC - Dublin Corporation.

Dublin Corporation (Irish: Bardas Bhaile Átha Cliath), known by generations of Dubliners simply as The Corpo, is the former name of the city government and its administrative organisation in Dublin since the time of Henry II. Significantly re-structured in 1660-1661, even more significantly in 1840, it was modernised on 1 January 2002, as part of a general reform of local government in Ireland, and since then is known as Dublin City Council.

https://en.wikipedia.org/wiki/Dublin_Corporation

CIE - Coras Iompair Eireann

https://en.wikipedia.org/wiki/CI%C3%89

Córas Iompair Éireann, (Irish Transport System), or CIÉ, is a statutory corporation of the Republic of Ireland, answerable to the Irish Government and responsible for most public transport in Ireland and jointly with its Northern Ireland counterpart, the Northern Ireland Transport Holding Company for the railway service between Ireland and Northern Ireland. The company is headquartered at Heuston Station, Dublin. It is a statutory corporation whose members are appointed by the Minister for Transport.

Looks like the "Three Castles" is also from Dublin Corp.

GSR - Great Southern Railway

The Great Southern Railways Company (often Great Southern Railways, or GSR) was an Irish company that from 1925 until 1945 owned and operated all railways that lay wholly within the Irish Free State

https://en.wikipedia.org/wiki/Great...ern_Railways

PAC - Prudential Assurance Company

The company was founded in Hatton Garden in London in May 1848 as The Prudential, Investment, Loan, and Assurance Association.
https://en.wikipedia.org/wiki/Prudential_plc

Wills - W.D. & H.O. Wills Limited.

W.D. & H.O. Wills was a British tobacco manufacturing company formed in Bristol, England. It was the first British company to mass-produce cigarettes, and one of the founding companies of Imperial Tobacco along with John Player & Sons.
https://en.wikipedia.org/wiki/W.D._&_H.O._Wills