What is included / what does it mean when it says Board: SC, BB, HB, FB, AI?

Board means what is included in the price of your accommodation. SC means self-catering (no meals are included). BB means bed and breakfast. HB means half board, in which breakfast and dinner are included. FB means full board, in which breakfast, lunch and dinner are included. AI means all-inclusive, in which all meals and all drinks are included.