Some HP inkjet printers use cartridges that expire 12 or 24 months after their warranty ends, or 18 or 30 months after being installed in your printer. Some of these printers will refuse to print until you've replace an expired cartridge.
Legend of the shamrock. St Patrick. The Irish shamrock symbol is closely associated with St Patrick, the patron saint of Ireland. St Patrick is believed to have been from Scotland or Wales. Irish raiders captured and enslaved him at the end of 4th Century. He spent six years in slavery, probably in the West of Ireland.
Irish Symbols. Ireland is an ancient country and has been home to several civilisations over thousands of years. Some of the important symbols used by these ancient communities have come to be symbols of Ireland itself and mean a great deal to many people who are proud of their Irish heritage. They are also numeous pieces of Celtic jewelry that use the ancient symbols as part of their design.