useful website

I've just remembered this really helpful website on writing systems:

http://www.omniglot.com/writing/definition.htm

Along the top of the page are links to sections on alphabets, syllabaries, and syllabic alphabets (the latter group being the scripts like devanagari, which are poised between alphabets and syllabaries). And there is also material on abjads (alphabets that only represent the language's consonant sounds, Hebrew and Arabic being examples) and semanto-phonetic scripts (like Chinese).