totaliser vs computer

totaliser and computer both are nouns.

Word	Noun	Adjective	Verb	Adverb
totaliser	Yes	No	No	No
computer	Yes	No	No	No

As nouns, computer is a hypernym of totaliser; that is, computer is a word with a broader meaning than totaliser:

totaliser: computer that registers bets and divides the total amount bet among those who won
computer: a machine for performing calculations automatically

totaliser (noun)	computer (noun)
a calculator that performs simple arithmetic functions	a machine for performing calculations automatically
computer that registers bets and divides the total amount bet among those who won	an expert at calculation (or at operating calculating machines)