Language rules explaining how to structure code are called ___rules

Postal codes have two groups of symbols, with the first group being letter-number-letter. If all letters are available and all decimal digits, how many such (first) groups are possible?

The shorthand digraph created for partial orders that only show direct comparisons (not the transitive closures of them), assume all arrows point down, and omit the loops is called a __ diagram.

The binary entity 0.001 as a decimal fraction equals

How many non-isomorphic (different) ordinary (free) trees are there on 3 vertices?

A 15-bit payload would be Hamming encoded in ___ total bits.

A relation R on a set S is a partial order if it is 

The set of automorphisms of a graph form a group under composition because

A lattice that has both an I and an O is said to be

The decimal fraction 0.375 rendered in binary notation equals