For credit card processing, stock exchanges, and airline reservations, data availability must be continuous. There are many other examples of mission-critical applications. Research the Internet to find four additional mission-critical applications and explain why data availability must be continuous for these applications. If you use information from the Web, use reputable sites. Do not plagiarize or copy from the Web. Be sure to cite your references.

The answer to this question can be described as follows:

Explanation:

The mission-critical System-

A vital mission program is necessary for an organization's life. If a critical task program disrupted, industrial control should be severely affected.  The essential support device is often referred to as critical task equipment.

Safety system for nuclear reactors-

The nuclear power plant is used to control the system, and it also contains and continues reactions.  It's also usually used only for energy production, and also used experiments and clinical isotope manufacture.  

If another system of nuclear power fails, this could result in a continuous nuclear reaction in a range of aspects like irradiated leaks. These same persons across the area may experience serious radioactivity symptoms.

The main task in their personal life-  

They realize, that without power, they turn down your entire life when you've never encountered a dark off with more than 30 minutes. Essentially, people wouldn't have been allowed to do what you'll do, entirely frozen.  

Consumer survey: big financial transfer controlling business-

That company is the infrastructure and software supplier for banks, traders, distributors, and institutional investors to take out money transfers. With all the money transfers they depend on, you must establish a successful company to become the 'guy behind the button', etc.

browsing like internet search? don't look at anything stupid. or set up restrictions on ur device's search engine. and if something suspicious comes up don't be dumb and click on it. i hope that's what ur question meant.