What's mean Information Technology (IT)?

it is a system specially computer and telecommunications for retrieving and sending information. 

Information Technology is a discipline involving the use of technology such as Computers (hardware & Software) to process, store and disseminate data /information securely .

Aimed at design and implementing advanced traditional computing environment. IT architecture is an integrated framework for acquiring and evolving IT to achieve strategic goals. it has both 'logical' and 'technical' component. The logical components include mission functional and informational requirements system configurations,   and information flows. The technical components include IT standards and rules that will be used to implement the logical architecture. It therefore includes both computing and communication network technology in the same world.