actually CISCO would be written in romaji not katakana
by the end of the first grade, they learn all like 105 hiragana, 105 katakana, 26 romaji, and like 100 kanji
3 "alphabets" and 100 symbols.
thats a hell of a lot imo
and you have to learn the 1-6 "definitions" and pronunciations for those 100 kanji
and know what? the 107 hiragana and the 105 katakana are just different ways to write the same goddamn thing.
and you know what? all of those 310 symbols can be expressed in the 26 romaji.
and...
there are more "letters" in romaji than there are in all of hiragana, katakana, and kanji.
you can express the whole of all 3 in romaji. you cannot express the whole of romaji in any of the 3.
then there is the logical in-consistency in the formation of the charecters. they all stem from the "vowels" yet few of them share charecteristics from the vowels.
hiragana:
51 base symbols, 3 are unused, 48 used symbols. 26 nigori. 33 combinations
you have to learn how to read 107 symbols.
katakana:
49 base symbols, 3 are unused, 46 used symbols. 26 nigori. 33 combinations
you have to learn how to read 105 symbols.
if you want to read classicial japanese literature, you have to learn the unused symbols for both katakana and hiragana.