By 1899, trained postal staff took over mail delivery and relieved the NWMP of this task.
If the private sector were to take over mail delivery and be given access to the small/cheap mail market without a similar mandate, probably 20% of America would suddenly be unable to receive a letter at home.
Alternatively, rivals may hand over mail to the national operator for final delivery, akin to the last-mile connection that gives new entrants access to existing telecoms infrastructure.
The New Years Eve invite, which was posted on Facebook and circulated over mail, implored people to "Be Warm- Bring Family, Friends, Lovers, Pets" and "Come Dented and Painted".
World War II severely disrupted the postal service, and the German occupation forces exerted strict control over mail conveyed within a homeland that had been divided into virtually separate zones.
The new Australian controversy over Mail Online's form of journalism – or, more accurately, churnalism – is but the latest instance of a long-running debate since the dawn of the digital revolution.
Technical level: The third form of interoperability is describing the difficulty to merge the technical carriers: data sent over radio waves is difficult to merge with data sent in a letter over mail.
There are a number of cosmetic changes, including a wider page layout, a bigger search bar, and intelligent use of Ajax to make the page more interactive (mouse over "mail" in the right sidebar, for example).
