Information technology (IT) is the application of computers to store, study, retrieve, transmit, and manipulate data, or information, often in the context of a business or other enterprise. IT is considered a subset of information and communications technology (ICT). In 2012, Zuppo proposed an ICT hierarchy where each hierarchy level "contain[s] some degree of commonality in that they are related to technologies that facilitate the transfer of information and various types of electronically mediated communications." 

The term is commonly used as a synonym for computers and computer networks, but it also encompasses other information distribution technologies such as television and telephones. Several industries are associated with information technology, including computer hardware, software, electronics, semiconductors, internet, telecom equipment, and e-commerce. Humans have been storing, retrieving, manipulating, and communicating information since the Sumerians in Mesopotamia developed writing in about 3000 BC, but the term "information technology" in its modern sense first appeared in a 1958 article published in the "Harvard Business Review"; authors Harold J. Leavitt and Thomas L. Whisler commented that "the new technology does not yet have a single established name. We shall call it information technology (IT)." Their definition consists of three categories: techniques for processing, the application of statistical and mathematical methods to decision-making, and the simulation of higher-order thinking through computer programs.
What does IT stand for?
What is it a subset of?
What company had a new hierarchy idea?
What year?
Did this involve info transfer?
What was the title of this hierarchy?
When did the term information technology first show up?
Where did it appear?
In what publication?
Did it have more than one author?
Who was one?
Who was the other?
Did IT had and establish name at the time?
How many categories was their definition have?
What was one?
Did one involve math?
Which one was that?
What was the third one?
Since what ancient time have we communicating information?
What was that era called?
nformation technology
nformation technology (IT)
ICT
IT is considered a subset of information and communications technology (ICT)
Zuppo
 In 2012, Zuppo proposed an ICT hierarchy
2012
 In 2012, Zuppo proposed an ICT hierarchy
yes
facilitate the transfer of information a
ICT
 ICT hierarchy 
1958
irst appeared in a 1958 
in an article?
first appeared in a 1958 article published in the "Harvard Business Review"
Harvard Business Review
958 article published in the "Harvard Business Review
yes
authors Harold J. Leavitt and Thomas L. Whisler 
Harold J. Leavitt
Harold J. Leavitt 
Thomas L. Whisler
Thomas L. Whisler 
no
"the new technology does not yet have a single established name.
Three
heir definition consists of three categories:
techniques for processing
heir definition consists of three categories: techniques for processing, the application of statistical and mathematical methods to decision-making, and the simulation of higher-order thinking through computer programs.
yes
 the application of statistical and mathematical methods to decision-making, 
the application of statistical and mathematical methods to decision-making
the application of statistical and mathematical methods to decision-making
the simulation of higher-order thinking through computer programs.
the simulation of higher-order thinking through computer programs.
3000 BC
writing in about 3000 BC
Mesopotamia
 Mesopotamia developed writing in about 3000 BC