And a number of different estimates could be produced depending what software is used to model the satellite's decay, explained Dr Eves, who is lead mission concept engineer at Surrey Satellite Technology Limited (SSTL).

BBC: Nasa refines satellite crash time

Recognizing that a single mind no longer had the capacity to direct across the battlefield, they developed the concept of mission command.

FORBES: How to Win the Long Economic War: Five Fundamental Strategies

The second unfortunate consequence of the marketisation of higher education in America, this retreat from the concept of public mission is a potential loss of universities as centres of basic learning.

BBC: NEWS | UK | Education | Higher education 'market' warning

One key design difference between the US concept and Euclid would be the emphasis the American mission would place on using exploded stars, supernovas, as markers to measure the expansion rate of the Universe.

BBC: Euclid telescope to probe dark universe

The Federal IT Shared Services Strategy is an enduring concept, which must be ingrained in agency management cultures to ensure that mission success continues during times of tight budgets.

WHITEHOUSE: Introducing the IT Shared Services Strategy

This is a plan devised out of a profound ignorance of or willful disregard for not only the library's original concept and design, but also the folly of altering its meaning and mission and compromising its historical and architectural integrity.

WSJ: New York Public Library | Undertaking Its Destruction | By Ada Louise Huxtable

And while Durkee knows he took a risk with an unproven technology, he thinks his success has served as a proof of concept for established companies that are reluctant to take a chance with Linux on their mission-critical systems.

CNN: Linux gaining with mission-critical systems

"The concept of free learning for all students is well aligned with UNESCO's global mission to provide education for all, which now seems imminently more doable with the mainstream adoption of OER in our formal education institutions, " said Dr Visesio Pongi, Director of the UNESCO Office in Apia.

UNESCO: Communication and Information

Backing up your personal PC to external media might still be a novel concept for some, but any IT manager fresh out of school can tell you that regularly backing up mission-critical servers -- and storing those backups in multiple physical locations -- isn't merely important, it's practically non-negotiable, and it only becomes that much more critical before undertaking hardware maintenance.

ENGADGET: Sidekick failure rumors point fingers at outsourcing, lack of backups