Information Technology (IT), as defined by the Information Technology Association of America (ITAA) is: "the study, design, development, implementation, support or management of computer-based information systems,
particularly software applications and computer hardware." In short, IT deals with the use of electronic computers and computer software to convert, store, protect, process, transmit and retrieve information, securely.
In this definition, the term "information" can usually be replaced by "data" without loss of meaning. Recently it has become popular to broaden the term to explicitly include the field of electronic communication so that people tend to use the abbreviation ICT (Information and Communication Technology).
The history of information technology predates the invention of the modern digital computer by many centuries. Machines for calculating fixed numerical tasks, such as the abacus, have existed since antiquity. Wilhelm Schickard built the first mechanical calculator in 1623.[1] Charles Babbage designed a difference engine in Victorian times[2], and around 1900 the IBM corporation sold punch-card machines[3]. However all of these machines were constrained to perform a single task, or at best, some subset of all possible tasks.
During the 1940s, as newer and more powerful computing machines were developed, the term computer came to refer
to the machines rather than their human predecessors. As it became clear that computers could be used for more than just mathematical
calculations, the field of computer science broadened to study computation in general. Computer science began to be established as a distinct academic discipline in the 1960s, with the creation of
the first computer science departments and degree programs.[4] Since practical computers became available, many applications of computing have become distinct areas of study in their
own right.
Information Technology Today
Today, the term Information Technology has ballooned to encompass many aspects of computing and technology, and the term
is more recognizable than ever before. The Information Technology umbrella can be quite large, covering many fields. IT professionals
perform a variety of duties that range from installing applications to designing complex computer networks and information
databases. A few of the duties that IT professionals perform may include: