ITC = italki credits italki credits (ITC) are used to pay for services and products on italki. You can purchase italki credits with paypal, alipay, credit cards and other forms of payment. italki Credits (ITC) are pegged to the US Dollar. 10 ITC = 1 USD

This could mean everything. It depends on context. Can you provide text where you found this abbreviation? For example if it from IT-newspaper it can mean Information Technologyes( IT means this ) Conference. But i guess the best way it this kind of situation is to simply look for this abbreviation on wikipedia: http://en.wikipedia.org/wiki/ITC