[mpwoz]

Teaspoon. "Tbsb" is usually used as abbreviation for tablespoon

[hnick]

Usually the lower case and capital 'T' is the main difference.

Confusingly also note that UK/US TBsp = 3x tsp (approx 15ml) while Australia is 4 tsp (20ml). It might be relevant for some recipes. I don't know why we are the weird ones this time.