What is "ITC"? Well ,i'm a new comer ,please tell me what's :ITC".Thank you .

First notebook entry: Introducing myself Hello,everyone!~!I'm Cassiel. I am a senior 3 student.And i live in SiChuan,China.I like sing songs,but i'm afried to sing in public.In fact ,i'm not shy. Well,i like to sing English songs,because i love English.It's a beatiful language.And i will gratuate half a year layer. I want to get good grades.and make my mom happy.So... Then, i like making friends.So i come here to make some friends from other countries. Emm...That's all.