30th : technology.

Technology is the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal or perform a specific function. It can also refer to the collection of such tools, machinery, modifications, arrangements and procedures.

from: http://en.wikipedia.org/wiki/Technology

a : the practical application of knowledge especially in a particular area : engineering 2 technology> b : a capability given by the practical application of knowledge technology>

2

: a manner of accomplishing a task especially using technical processes, methods, or knowledge technologies for information storage>

3

: the specialized aspects of a particular field of endeavor technology>

from: http://www.merriam-webster.com/dictionary/technology

[mass noun]

• the application of scientific knowledge for practical purposes, especially in industry: advances in computer technology [count noun]: recycling technologies
• machinery and equipment developed from scientific knowledge: it will reduce the industry’s ability to spend money on new technology
• the branch of knowledge dealing with engineering or applied sciences.

  from: http://oxforddictionaries.com/definition/english/technology   

p/s: it's EDU 3105 period. ^_^