olemus tähisena
https://en.wikipedia.org/wiki/I_(disambiguation)

näiteid
I = 1, Rooma numbrina (Roman numeral)
I = jood (Iodine)
I, i = elektrivool (electric current)
I, i = kursiiv (italics)
i = imaginaarühik (imaginary unit) = √-1
i = indeksmuutuja (index variable)
i- = Apple'i tooteprefiks (a prefix for Apple products): iPod, iPhone