=====data Keyword 2=====
stack underflow condition

====Definition====
When a command in a program tries to pop an element from an empty stack causing it to error out.

====References====

  * http://en.wikipedia.org/wiki/Stack_(abstract_data_type)
  * http://comjnl.oxfordjournals.org/content/20/1/56.full.pdf

=====data Keyword 2 Phase 2=====
queue enqueuing operation

====Definition====
Enqueuing is the operation of putting something at the end of a queue There for adding something to the queue

====References====
List any sites, books, or sources utilized when researching information on this topic. (Remove any filler text).

  * Reference 1
  * Reference 2
  * Reference 3


====Demonstration====
Demonstration of the indicated keyword.

If you wish to aid your definition with a code sample, you can do so by using a wiki **code** block, an example follows:

<code c>
/*
 * Sample code block
 */
#include <stdio.h>

int main()
{
    return(0);
}
</code>

Alternatively (or additionally), if you want to demonstrate something on the command-line, you can do so as follows:

<cli>
lab46:~$ cd src
lab46:~/src$ gcc -o hello hello.c
lab46:~/src$ ./hello
Hello, World!
lab46:~/src$ 
</cli>