Subgroup structure of groups of order 8

Number of subgroups per isomorphism type
The number in each column is the number of subgroups in the given group of that isomorphism type:

Number of conjugacy classes of subgroups per isomorphism type
The number in each column is the number of conjugacy classes of subgroups in the given group of that isomorphism type:

Number of automorphism classes of subgroups per isomorphism type
The number in each column is the number of automorphism classes of subgroups in the given group of that isomorphism type:

Number of subgroups per order
Note that by the congruence condition on number of subgroups of given prime power order, all the counts of total number of subgroups as well as number of normal subgroups are congruent to 1 modulo the prime $$p = 2$$, and hence are odd numbers.

Number of abelian subgroups per order
This is identical to the above table, because all groups of order 2 or 4 are abelian.

Subgroups of order 2
The table below provides information on the counts of subgroups of order 2. Note the following:

Subgroups of order 4
The table below provides information on the counts of subgroups of order 2. Note the following: