Also known as the big bang changeover. Change to the new system immediately.

Initially, only part of the new system is deployed with the rest still on the old system. As the new parts are accepted the old is phased out.

The new system is rolled out to a self-contained branch before being rolled out to the rest.

This is the safest method of changeover.

This changeover method is reserved for critical systems.

This changeover method requires the old system to work with the new system.

With this changeover method only one branch is affected by any problems.

This changeover method is high risk if it fails.

Pierre Omidyar founded which popular online auction company in 1995 out of San Jose, California?

While building magnetrons at MIT in the 1940s, Percy Spencer noticed a melting chocolate bar in his pocket. Deeper investigation and exploration led to the invention of what household device? Spencer received no royalties for this invention, first marketed as the Radarange.

Supposedly pronounced as "wizziwig," what is the meaning of the acronym WYSIWYG? The phrase largely means that the printer will print what you see on your monitor.

Dolly the Ewe's birth in 1996 and subsequent life helped prove the viability of what scientific and technological process?