Virtually all American style guides recommend to follow both “i.e.” and “e.g.” with a comma (just like if “that is” and “for example” were used instead), so the very same sentence in American English would become: They sell computer components, e.g., motherboards, graphic cards, CPUs.
Where is the comma with IE?
In the American style of writing, a comma is inserted before and after i.e. However, in the British style of writing, a comma is inserted before but not after i.e.
How do you write ie correctly?
The abbreviation "i.e." should always appear with a lowercase "i" and a lowercase "e" in a sentence, with a period between both letters. Do not italicize or bold it. The abbreviation "i.e." does not need to be formatted differently than the rest of the document or paper.
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