Both are abbreviations, but “e.g.” originates from the Latin “exempli gratia,” which means “for the sake of an example,” and “i.e.” comes from “id est,” which means “that is,” or “in other words”: John likes fruit (e.g., apples, pears) but not vegetables (i.e., he eats more fruit than vegetables). To remember the difference, think of the “e” in “e.g.” as short for “example” and the “i” in “i.e.” as standing for “in other words.” Follow each with a comma.