system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do the countries that used to be a part of the British Empire (Canada, New Zealand, Australia, etc) have a dollar ($) for a currency, instead of a pound (£) like Britain?

Just a thought I had, and it made me wonder. You'd think that when Britain gave Australia, Canada, and whatnot, their independence that they would have the pound as the currency. It's like they decided to join America on the dollar bandwagon.
gpt
New Zealand and Australia used their own independent pounds, shillings and pence for some time after they had independence. When they decimalised, they found people worked in shillings. So they came up with a system where the cent was similar in value to the old penny, and 10 cents was a worth one old shilling. To keep it decimal, they needed a new currency worth 100 cents, and so they picked the name "dollar" because it's understood as a currency name, and other proposals were unpopular.

Other countries weren't straight for their own currency, and adopted a decimal currency with a similar value to their neighbours. Dollars were recognizably different from pounds, so made sense.