FIGI (Financial Instrument Global ID) also known as BLoomberg Global ID:
ISIN can have many associated SEDOLs which in turn can have many FIGIs.

MICs are a universally recognized method of identifying exchanges, trading platforms and regulated or nonregulated markets. MICs have 2 levels: 
• A Market segment MIC is a MIC which identifies a section of one of the above entities that specializes in one or more specific instruments or that is regulated differently. i.e. XNGS (NASDAQ Global Select Markets) is a Market segment MIC. 
• An Operating MIC, each Market segment MIC has a parent MIC which is called the “Operating MIC”. i.e. XNAS (NASDAQ) is an Operating MIC.