technology vs subject area

technology and subject area both are nouns.

Word	Noun	Adjective	Verb	Adverb
technology	Yes	No	No	No
subject area	Yes	No	No	No

As nouns, subject area is a hypernym of technology; that is, subject area is a word with a broader meaning than technology:

technology: the discipline dealing with the art or science of applying scientific knowledge to practical problems
subject area: a branch of knowledge

Other hypernyms of technology include bailiwick, discipline, field, field of study, study, subject, subject field.

technology (noun)	subject area (noun)
the application of the knowledge and usage of tools (such as machines or utensils) and techniques to control one's environment	a branch of knowledge
machinery and equipment developed from engineering or other applied sciences
the discipline dealing with the art or science of applying scientific knowledge to practical problems