What do the EQ, BE, BL, BT, IL, etc. series stand for on NSE?

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Series	Representation	Trading
EQ	Equity	Delivery-based and intraday trading is allowed.
BE	Book Entry	Only delivery-based trading is permitted; intraday trading is not allowed.
BL	Block Deals	Trades executed through a single transaction with: i. A minimum quantity of 5 lakh shares, OR ii. Value of Rs. 5 crores Block deals are allowed only from 9:15 a.m. to 9:50 a.m.
BT	Shares held in physical form	Provides an exit route to small investors with a maximum of 500 shares held in physical form.
BZ	Stocks that are blacklisted for violation of exchange rules	Stocks that fall under the Trade-to-Trade (T2T) category. Buy Today Sell Tomorrow (BTST) and intraday trading of such stocks is not allowed.
GC	Government Securities and Treasury Bills	Exchange-traded government securities and treasury bills.
IL	Facilitates Foreign Institutional Investors (FIIs) to trade among themselves	Permitted for securities whose maximum limit for FII trading is not breached.
IQ	Qualified Foreign Investors (QFIs)	Securities QFIs can trade without prior depository approval.