DADS 2nd level index page
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nondeterministic tree automaton
nondeterministic Turing machine
nonterminal node: see internal node
nor
not
Not So Naive
NP
NP-complete
NP-complete language
NP-hard
n queens
nullary function: see 0-ary function
null tree
NYSIIS
O: see big-O notation
OBDD
objective function
oblivious algorithm
occurrence
octree
off-line algorithm
offset
omega
omicron
1-based indexing