[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] abs opcode  Abstract Syntax Tree (AST)  acos opcode  add opcode  2nd  3rd  addition operator (+)  addr instruction (IMCC)  aggregate PMCs  allocating named variables and temporary register variables (IMCC)  and opcode  2nd  and operator  anonymous arrayref constructor  anonymous classes  anonymous subroutines  Apocalypse series  architecture     Parrot      Perl 6  arithmetic operators  arrayrefs      anonymous constructor  arrays      matching  asec opcode  asin opcode  assertions      syntax for  assign opcode  2nd  assignment operators  2nd  AST (Abstract Syntax Tree)  asynchronous I/O  atan opcode  2nd  attribute model, slot-based  attributes, class