-["+", "Add\nSum of A and B", "Identity\nNo change to B"],
-["−", "Subtract\nA minus B", "Negation\nChanges sign of B"],
-["×", "Multiply\nA multiplied by B", "Signum\n¯1 if B<0; 0 if B=0; 1 if B>0"],
-["÷", "Divide\nA divided by B", "Reciprocal\n1 divided by B"],
-["⋆", "Exponentiation\nA raised to the B power", "Exponential\ne to the B power"],
-["○", "Circle\nTrigonometric functions of B selected by A\nA=1: sin(B) A=2: cos(B) A=3: tan(B)", "Pi times\nMultiply by π"],
-["?", "Deal\nA distinct integers selected randomly from the first B integers", "Roll\nOne integer selected randomly from the first B integers"],
-["∈", "Membership, Epsilon\n1 for elements of A present in B; 0 where not."],
-["⌈", "Maximum, Ceiling\nThe greater value of A or B", "Ceiling\nLeast integer greater than or equal to B"],
-["⌊", "Minimum, Floor\nThe smaller value of A or B", "Floor\nGreatest integer less than or equal to B"],
-["⍴", "Reshape, Dyadic Rho\nArray of shape A with data B", "Shape, Rho\nNumber of components in each dimension of B"],
-["↑", "Take\nSelect the first (or last) A elements of B according to ×A"],
-["↓", "Drop\nRemove the first (or last) A elements of B according to ×A"],
-["⊥", "Decode\nValue of a polynomial whose coefficients are B at A"],
-["⊤", "Encode\nBase-A representation of the value of B"],
-["∣", "Residue\nB modulo A", "Absolute value\nMagnitude of B"],
+["∼\nt", undef, "Not, Tilde\nLogical: ∼1 is 0, ∼0 is 1"],
+["⍨\nT"],
+["+\n-", "Add\nSum of A and B", "Identity\nNo change to B"],
+["−\n_", "Subtract\nA minus B", "Negation\nChanges sign of B"],
+["×\n-", "Multiply\nA multiplied by B", "Signum\n¯1 if B<0; 0 if B=0; 1 if B>0"],
+["÷\n=", "Divide\nA divided by B", "Reciprocal\n1 divided by B"],
+["⋆\np", "Exponentiation\nA raised to the B power", "Exponential\ne to the B power"],
+["⍣\nP"],
+["○\no", "Circle\nTrigonometric functions of B selected by A\nA=1: sin(B) A=2: cos(B) A=3: tan(B)", "Pi times\nMultiply by π"],
+["⍥\nO"],
+["?\nq", "Deal\nA distinct integers selected randomly from the first B integers", "Roll\nOne integer selected randomly from the first B integers"],
+["∈\ne", "Membership, Epsilon\n1 for elements of A present in B; 0 where not."],
+["⍷\nE"],
+["⌈\ns", "Maximum, Ceiling\nThe greater value of A or B", "Ceiling\nLeast integer greater than or equal to B"],
+["⌊\nd", "Minimum, Floor\nThe smaller value of A or B", "Floor\nGreatest integer less than or equal to B"],
+["⍴\nr", "Reshape, Dyadic Rho\nArray of shape A with data B", "Shape, Rho\nNumber of components in each dimension of B"],
+["↑\ny", "Take\nSelect the first (or last) A elements of B according to ×A"],
+["↓\nu", "Drop\nRemove the first (or last) A elements of B according to ×A"],
+["⊥\nb", "Decode\nValue of a polynomial whose coefficients are B at A"],
+["⊤\nn", "Encode\nBase-A representation of the value of B"],
+["∣\nm", "Residue\nB modulo A", "Absolute value\nMagnitude of B"],