> But the basics of any writing is called Alphabet?
At some level of abstraction, all writing systems are similar and could be said to be alphabetic.
However, your typical alphabetic language has a small _fixed_ alphabet - 26 symbols in English. While a typical logographic language has a huge _variable_ alphabet - you need to know several thousands of symbols to be considered literate in Chinese, while dictionaries enumerate at least an order of magnitude more, and more of those characters are being created.
An alphabetic language works by concatenating invariable symbols into strings to represent words, a logographic language is more about having a symbol for every word. The picture posted by Egor earlier in this thread demonstrates this nicely.
Cheers,
V.
