mostly for convenience
No, it is 'generations'.
by technology through the first 3 generations, after that there is some disagreement.
2 separate species.
They are now two different species.
Computers are classified by a number of aspects. By purpose/functionality they are classified into special and general purpose. By size they are classified into mainframes, mini computers, desktops and portables. Historically, the more recent generations of computers were smaller in size and more general-purpose than their predecessors.
generations to generations
Just simply "generations". Generations is already a plural of the word generation.
Ten generations
6 generations
Ten generations
There is no chao in generations.....
19.07 generations