Instrument types, etc.

#1
Hello guys,
i'm new to this forum and new to trading. Do we have a glossary of terms here ? It would be great if someone explained newbies like me the meaning of the following terms.

1) Intrument types :
what is the following : ( i know basic idea of options etc. but not technical words like below)

OPTIDX
OPTSTK
FUTIDX
FUTSTK

i used to think OPTSTK is call option and OPTIDX is put option. but on nse.com, i saw the following combination : OPTIDX NIFTY CE (ce is call perhaps)


2) Also what is the difference between CE and CA and PE and PA?


3) I am currently trading on sbicaps. there while trading options they have a button called "AMO". what is it?

thanks in advance.
 

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