bulletin board system vs electronic bulletin board

bulletin board system and electronic bulletin board both are nouns.

Word	Noun	Adjective	Verb	Adverb
bulletin board system	Yes	No	No	No
electronic bulletin board	Yes	No	No	No

As nouns, bulletin board system and electronic bulletin board are synonyms defined as:

bulletin board system and electronic bulletin board: a computer that is running software that allows users to leave messages and access information of general interest

Other synonyms of bulletin board system include bbs, bulletin board.

bulletin board system (noun)	electronic bulletin board (noun)
a computer that is running software that allows users to leave messages and access information of general interest	a computer that is running software that allows users to leave messages and access information of general interest